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Northern Virginia town population growth, minority-majority transition, foreign born population transformation, and more demographics, data and graphs. Analyzed by the Northern Virginia Regional Commission (NVRC). Race and Ethnicity of Towns Reports, maps, and charts are best viewed on a desktop or tablet. Race and Ethnicity of Towns Overview A big story of the region is its diversification and majority-minority transition. There will soon be a day when the majority of people will belong to a minority group (any group other than non-Hispanic White alone). Much of this is attributed to the sizable increases in the number of Hispanics, Asians, and multiracial persons in the region. The following charts show the region's population by race and ethnicity, along with analyses of diversity for Northern Virginia and its incorporated towns. Upcoming Changes to Categorization of Race/Ethnicity Race/ethnicity data collected by the U.S. Census Bureau is the primary source of race and ethnicity demographics. The U.S. Census Bureau currently collects race and ethnicity data based on the U.S. Office of Management and Budget (OMB) standards from 1997. New race/ethnicity standards were adopted by the Office of Management and Budget on March 28, 2024, the first such adoption since 1997. Changes are coming to how race and ethnicity information will be collected and reported in the United States. Federal agencies, including the U.S. Census Bureau, must implement the new standards into data collections as soon as possible, but no later than March 28, 2029. The U.S. Census Bureau American Community Survey (ACS), a survey conducted annually, will be one of the first U.S. Census Bureau products to implement the new standards. As of July 2024, the U.S. Census Bureau was proposing to begin implementation of data collection in 2026 or 2027 for the ACS products. The 2030 Decennial Census will also reflect the new standards. The new race categories will offer individuals more precise ways to self-identify, especially for people who self-identify as multiracial or multiethnic. This will result in a more accurate representation of the U.S. population's race and ethnic characteristics. Changes will include a single combined question instead of separate race and ethnicity questions. Also, a new "Middle Eastern or North African" category will be added. These changes aim to better reflect the diversity of the American population. These changes will create challenges and implications for our understanding of the population and trends because the data will not be comparable to prior data. These modifications will alter the population size of subgroups. Specifically, the Census Bureau’s 2015 National Content Test results suggest anticipating increases in those identifying as Middle Eastern or North African, Hispanic or Latino, and Black or African American. Conversely, the number of individuals categorized as “white” or "some other race" is projected to decline. The combined race and ethnicity question is also expected to improve response rates for the race component on the decennial census and ACS forms. More information can be found on the U.S. Census Bureau's website . Decennial Census Data The Decennial Census is based on a survey of the entire population. It is conducted once a decade. The 2020 Decennial Census population was released on August 12, 2021. The Decennial Census regional, county, and city population data is shown in the interactive charts that follow. The 2020 Census had improvements to the design of the two separate questions for race and ethnicity, data processing, and coding, which enabled a more thorough and accurate depiction of how people prefer to self-identify. These changes along with actual demographic changes in the population result in the changes seen from 2010 to 2020 in the following data. For more details on the 2020 Census questionnaire changes and its impacts please view the U.S. Census Bureau's technical information . The following charts show the region's population by race and ethnicity, along with analyses of diversity for Northern Virginia and its incorporated towns. People of Hispanic/Latino origin are an ethnic group and may be of any race. To display Hispanic/Latino together with racial groups, it is common to cross-tabulate race and ethnicity to display Hispanic/Latino as a single category and the non-Hispanic race groups as categories that sum to the total population. This means of displaying race and ethnic data has become quite common and for available data, it is the closest categorization c ompared to the new race/ethnicity standards that were adopted by the Office of Management and Budget on March 28, 2024 (for more information see prior section ). With this classification, Hispanic/Latino is treated identically to major race groups and not independently of race. Also, Census Bureau research has shown that this classification is much less impacted by the 2020 Census questionnaire improvements. NVRC has migrated its demographic analysis to the cross-tabulated categories. The following charts, as well as the calculation of diversity, use the cross-tabulated categories.

Northern Virginia educational attainment, public school student enrollment, and more demographics, data and graphs by region and county. Analyzed by the Northern Virginia Regional Commission (NVRC). Education Overall Education Data of Northern Virginia What is it that sets Northern Virginia apart from other places, that gives Northern Virginia its competitive edge, that makes it such a unique, dynamic and interesting place? It’s unparalleled human capital, the people who live here, work here, and come here from all corners of the globe. Proximity to the nation’s capital has transformed Northern Virginia and the entire Washington metropolitan area into one of America’s — and the world’s — most dynamic, fastest growing, economically advanced, highly-educated , prosperous, and culturally-diverse regions on the planet. The region has some of the top, most renowned public school systems in the nation. The quality of education in the region's public school systems draws numerous amounts of families to the region. The demographic, social, and economic profile of this region shows it. Detailed information on the region and its counties and cities are available on the following education topics . Educational Attainment Student Enrollment

Immigrant labor force data compiled by the Northern Virginia Regional Commission's as part of the One Region immigration study, Coronavirus (COVID-19) immigration study, and data dashboard to assess the economic impact of immigrants in Northern Virginia. Labor Force - Overall Reports, maps, and charts are best viewed on a desktop or tablet. Key Facts Labor Force - Overall Northern Virginia’s immigrant population is well-suited to maintaining and expanding the region’s labor force In Northern Virginia, immigrant entrepreneurs – those who work for their own businesses, incorporated or not – are making their mark locally. 2013 to 2017 Period Key Facts: In Northern Virginia, less than two-thirds, or 61.6 percent of the U.S.-born population are of working age — between 16 and 64 years old — the range considered to be working age by the Department of Labor. Meanwhile, more than four out of five, or 83.9 percent of the immigrant population in the region are of working age. While immigrants make up 27.4 percent of the overall population, they make up 34.0 percent of the region’s working-age population. Northern Virginia has a high percentage of immigrants, 31.8 percent, working in STEM industries compared to 22.8 percent of immigrants overall in the United States. What are the top 3 industry sectors of the U.S. Born labor force? What are the top 3 industry sectors of the U.S. Born labor force? Source: 2013-2017 American Community Survey, 5-Year Sample, downloaded from IPUMS USA, University of Minnesota, www.ipums.org . 1. Professional Services (25.4%) 2. Administration (14.7%) 3. Education ( 9.6%) What are the top 3 industry sectors of the Foreign Born labor force? What are the top 3 industry sectors of the Foreign Born labor force? 1. Professional Services (20.7%) 2. Entertainment, Arts, and Hospitality (12.1%) 3. Construction (10.8%) Source: NAE analysis of the 2013-2017 American Community Survey,5-Year Sample, downloaded from IPUMS USA, University of Minnesota, www.ipums.org ; ITEP, “Who Pays?”; Congressional Budget Office; U.S. Social Security Administration.

Northern Virginia income, economically disadvantage populations, workforce, and more demographics, data and graphs by region and county. Analyzed by the Northern Virginia Regional Commission (NVRC). Median Household Income Overall Reports, maps, and charts are best viewed on a desktop or tablet. Median Household Income of Northern Virginia Overview Northern Virginia is known for having communities with some of the highest median incomes in the United States, including the county with the highest in the nation. High median household incomes coincide with the large, thriving business community of the Northern Virginia region. While the median household income is high, it must be recognized that there are segments of the community in need of assistance that live in this prosperous region of the country and that high housing costs offset the high income when it comes to standards of living and well-being. About the Data and Proper Data Interpretation Median household income data is sourced from the U.S. Census Bureau 2000 Census and the American Community Survey (ACS). It is important to note that any data sourced from the ACS is based on a small sample of the population of a place. Areas with smaller populations, such as the cities of Northern Virginia, may have a larger margin of error in the data due to the survey sample size being small. This is less of an issue the larger the population. The margin of error is shown in the popup that is displayed when hovering over a bar in the bar charts. If there is a large increase or decrease in the estimate from one time period to the next, and the margin of error is large and overlaps other periods, then the large change between time periods is likely due to statistical sampling error and is not considered statistically significant. In addition to the margin of error, the accuracy of the American Community Survey data for an area can be gaged by evaluating the trend. If the data has a clear trend then the data from one period to the next can be deemed reliable. Median Household Income - Current Five-Year Estimates All jurisdictions in the United States are included in the five-year American Community Survey estimates. The Median household incomes for all Northern Virginia jurisdictions are shown in this graph. The median household income of every Northern Virginia jurisdiction is higher than the Commonwealth of Virginia and the United States. Out of all 3,144 jurisdictions in the USA, three of the five highest ranked for median household income are in Northern Virginia, and those include Loudoun County (1st), Falls Church City (4th), and Fairfax County (5th). Northern Virginia's median household income, at an estimated $142,583 (in 2023 dollars), is higher than 12th ranked Arlington, making Northern Virginia one of the most affluent regions of the USA. Median Household Income - Current One-Year Estimates Those jurisdictions with a population of 65,000 or more are included in the one-year American Community Survey estimates, of which there are five Northern Virginia jurisdictions. The median household incomes for the five largest Northern Virginia jurisdictions are shown in this graph. The Northern Virginia median household income for the one-year estimates is representative of the five largest jurisdictions in Northern Virginia only. The five largest jurisdictions of Northern Virginia all have incomes higher than the Commonwealth of Virginia and the United States. Out of the 843 jurisdictions with a population of 65,000 or more in the USA, four of the top twenty highest income jurisdictions are located in Northern Virginia, and those include Loudoun County (1st), Fairfax County (7th), Arlington County (9th), and Prince William County (16th). The median household income of Northern Virginia's five largest jurisdiction together is estimated to be $142,583 (in 2023 dollars), making Northern Virginia one of the most affluent areas of the USA. Median Household Income - Historic Compared to Current Five-Year Estimates The Northern Virginia region's median household income had been rising since 1999 until it dropped in the 2019-2023 period. The greatest upward transformations in median household income, to levels well beyond inflation, have occurred in the Counties of Arlington and Loudoun. Median Household Income - Historic Compared to Current One-Year Estimates The median household income trend, for the regions large jurisdictions (population of 65,000 or more), are shown in the following graph. The Northern Virginia regional household income distribution for the one-year estimates is representative of the five largest jurisdictions in Northern Virginia only. Key Facts: There were dips in median household income in the early 2010s for some jurisdictions. The effects of the recession from 2007 to 2009 were still causing economic hardships and in 2013 there was federal sequestration when the federal government made large budget cuts. The Northern Virginia region is heavily dependent on the federal government for its economy, as indirectly indicated by the job layoffs during sequestration causing a sharp decline in household incomes. Prior to the COVID-19 pandemic, specifically from 2012 to 2019 the trend in the Northern Virginia median household income was upward after accounting for inflation. Since 2019 it has been a downward trend after accounting for inflation. The COVID-19 pandemic began in early 2020, setting off a wave of demographic and economic changes in the region and around the nation. From a national perspective, wages lagged behind inflation in 2021 and 2022 according to the Bureau of Labor Statistics , but outpaced it in 2019, 2020 and since early 2023. Since Northern Virginia's downward trend has occurred in all years since 2019, demographic shifts are more at play than wages not keeping up with inflation. Notably, NVRC research has shown that workers retired early, immigration slowed, and many higher income office workers migrated out of the region to work remotely in places that have a more affordable cost of living. Policymakers have comprehensively addressed low-income housing; however, the pandemic has underscored the need to expand housing programs to serve middle-income two-person households earning up to $150,000 (roughly 120% of the HUD AMI) for enabling first-time home buyers to afford comfortable living and family life in the region. For further information on these demographic shifts, see the NVRC report Shifting Migration Patterns of Northern Virginia: Affordable Housing Needs published January 2025.

Northern Virginia population growth, minority-majority transition, foreign born population transformation, and more demographics, data and graphs by region and county. Analyzed by the Northern Virginia Regional Commission (NVRC). People / Population Information on the people of the overall Northern Virginia region and it's county and cities. Overall Information on the people of Northern Virginia's incorporated towns . Towns

Federal impact reports and studies on Northern Virginia, DC Metro Area, and Virginia. Federal Monitoring Reports/Resources NVRC Presentations School Planners Forum - June 4, 2025 Federal Impact on School Enrollment Presentation - NVRC's Senior Regional Demographer, Jill Kaneff, presented at the annual regional school planners forum hosted by Loudoun County Public Schools. The forum brought together school planners from across the D.C. region and beyond. Guidance on key demographic and economic indicators to monitor was provided to assist schools plan for the federal impacts on enrollment during these uncertain times caused by the federal layoffs and cutbacks. Virginia House Emergency Committee on the Impacts of Federal Workforce and Funding Reductions, April 8, 2025 NVRC's Senior Regional Demographer, Jill Kaneff, and the NVRC Chair presented at the committee meeting. The Northern Virginia Federal Workforce presentation is an overview of Northern Virginia federal workforce and data resources available for policy makers and the general public. Economy Virginia Economic Impacts The University of Virginia's Weldon Cooper Center for Public Service produces a quarterly economic forecast for the Commonwealth of Virginia. The center also publishes special studies and presentations that focus on the federal impacts. View the Weldon Cooper Center's research reports. Housing Market Bright MLS Bright MLS tracks and reports on the housing market conditions of Northern Virginia's and the Greater D.C. metropolitan area. Bright MLS News and Insights offers insightful research and surveys, covering topics such as the effects of DOGE and federal spending cuts. Featured informative resources also include the following. Monthly Market Report The monthly market reports include a Washington D.C. metro area market report and individual Northern Virginia jurisdiction market reports . These reports present market trends and comparative graphs showing current and historical data. Special Presentation in Coordination with NVRC Lisa Sturtevant, PhD, Chief Economist with Bright MLS, presented at the Loudoun County Public Schools Planners and GIS Forum on June 4, 2025: D.C. Metropolitan Area Housing Market Trends and Outlook . This presentation includes insightful comparative market trends not found in the monthly market reports. The forum brought together school planners from across the D.C. region and beyond. This presentation was part of a two set series on the federal impacts, with the first presentation being NVRC's presentation on Federal Impact on School Enrollment . Northern Virginia Association of Realtors The Northern Virginia Association of Realtor tracks and reports on the housing market conditions of the inner jurisdictions of Northern Virginia with data provided by George Mason University's Center for Regional Analysis and Bright MLS. On an annual basis, a report on housing market forecasts is produced in conjunction with the Center for Regional Analysis at George Mason University (GMU-CRA).

Northern Virginia economic and demographic maps to assess the federal cutback impacts. Federal Monitoring Maps Reports, maps, and charts are best viewed on a desktop or tablet. Federal Workforce Maps Northern Virginia Regional Commission presents a collection of federal civilian employment maps. The data analysis was performed by Northern Virginia Regional Commission using U.S. Census Bureau, 2023 American Community Survey 5-Year Estimates, Table S2408. The data is displayed by zip code tabulation areas, which are approximations of the USPS Postal Service zip codes. Two maps in the collection 1. Federal Share of Total Civilian Employment Click Map to View 2. Density per Square Mile - Federal Civilian Employment Click Map to View

Northern Virginia population growth, minority-majority transition, foreign born population transformation, and more demographics, data and graphs by region and county. Analyzed by the Northern Virginia Regional Commission (NVRC). Population Overall Reports, maps, and charts are best viewed on a desktop or tablet. Population of Northern Virginia Overview Northern Virginia is on the front lines of a demographic transformation shaping the United States. There has been an extraordinary amount of population growth in Northern Virginia. In 2024, the Northern Virginia population was 77% more than in 1990 when the population was 1,466,350. Population Estimate 2024 2,601,818 The COVID-19 pandemic began in the United States in March 2020 and the emergency declaration was lifted in May 2023. The pandemic changed the country's and region's demographic migration patterns significantly due to the substantial rise in remote work. Remote work is providing people with the opportunity to move to places away from employment centers. Most people relocate for family-reasons, housing reasons, and for more affordable, lower cost of living according to the U.S. Census Bureau Current Population Survey. Young adult, first time home buyers are the largest, working-age demographic group that are choosing to move to more affordable areas. In the four years since the pandemic, the country has had a wave of out-migration from urban areas to suburban and rural areas or smaller urban areas. The shift to remote work is one of the most impactful societal changes impacting demographic trends in the country and region, and likely will shape future trends for a long time. From July 1, 2020 to July 1, 2021, the nation's most populous areas, including Northern Virginia, experienced significant out migration and population declines. This was the first and only annual decline in Northern Virginia since the Census Bureau annual record keeping began in 1970, with a decline of an estimated 7,800 persons. Annual Estimates/Trends Decennial Census/Trends Annual Estimates Annual Estimates: Population, Natural Change (Births and Deaths), Migration Annual estimates of population and the components of change (domestic migration, international migration, births, and deaths) paint a portrait of the annual growth patterns in the towns of Northern Virginia. Annual estimates are not based on a full census of the population. Rather, they are estimates based on a compilation of multiple administrative data pieces such as birth records and residential building permits. The estimates are obtained from the U.S. Census, which benchmarks estimates to the Decennial Censuses. Decennial Census data represents the population as of April 1 of the year, whereas the annual estimates are as of July 1 of each year. Decennial Population Decennial Census Data: Population The Decennial Census is based on a survey of the entire population. It is conducted once a decade. The 2020 Decennial Census population was released on August 12, 2021. The Decennial Census regional, county, and city population data is shown in the interactive charts that follow. Key Facts: Decennial Growth In 2020, Northern Virginia's population was 2,550,337 according to the Decennial Census. The population increased from 1,466,409 in 1990, a 74% increase in the 30 year period from 1990 to 2020. Northern Virginia added approximately 320,000 people in this past decade, 2010 to 2020. This is 96,000 or 23% less than the previous decade, signaling a significant slowdown in the pace of growth. However, growth still continues at a high amount. Virginia’s population grew by 630,369 from 2010 to 2020, of which 50.7% of that growth was in Northern Virginia. In 2020, 29.5% of Virginia’s population was in Northern Virginia, compared to 27.9% in 2010. Growth peaked in 2010. Growth in Northern Virginia has slowed since 2010. It has trended down annually since 2010, but it is still large and impactful growth that the the region is facing. The localities in Northern Virginia the growth is occurring in this decade is different in some ways than in the 1990s and 2000s. The preponderance of population growth of Northern Virginia continues to be located in the outer-ring suburbs of Prince William, Loudoun Counties, and the Cities of Manassas and Manassas Park. However, the share of the region's growth that is in the outer-ring has dropped from 65.1% in the 2000 to 2010 period to 61.5% in the 2010 to 2020 period. Arlington has seen its share of the region's growth more than double from what it experienced in the 2000's. Alexandria has seen its share of the region's growth become 2.2 times what it experienced in the 2000's. Intensification of developmental pressures this decade in the inner-core is a response to the millennial generation preferences, demographics, urbanization, transportation and other market pressures.

Northern Virginia income, economically disadvantage populations, workforce, and more demographics, data and graphs by region and county. Analyzed by the Northern Virginia Regional Commission (NVRC). Household Income Distribution Overall Reports, maps, and charts are best viewed on a desktop or tablet. Household Income Distribution of Northern Virginia Northern Virginia is known for having communities with some of the highest incomes in the United States, including the county with the highest median household income in the nation. High incomes coincide with the large, thriving business community of the Northern Virginia region. While high incomes exist, we must recognize that there are segments of the community that are lower income and in need of assistance that live in this prosperous region of the country. About the Data and Proper Data Interpretation Median household income data is sourced from the U.S. Census Bureau 2000 Census and the American Community Survey (ACS). It is important to note that any data sourced from the ACS is based on a small sample of the population of a place. Areas with smaller populations, such as the cities of Northern Virginia, may have a larger margin of error in the data due to the survey sample size being small. This is less of an issue the larger the population. The margin of error is shown in the popup that is displayed when hovering over a bar in the bar charts. If there is a large increase or decrease in the estimate from one time period to the next, and the margin of error is large and overlaps other periods, then the large change between time periods is likely due to statistical sampling error and is not considered statistically significant. In addition to the margin of error, the accuracy of the American Community Survey data for an area can be gaged by evaluating the trend. If the data has a clear trend then the data from one period to the next can be deemed reliable. Five-Year Estimates - Current All jurisdictions in the United States are included in the five-year American Community Survey estimates. The share of households in each income cohort for all jurisdictions in Northern Virginia are shown in this graph. While Northern Virginia is known for having communities with some of the highest median incomes in the United States, it must be recognized that there are segments of the community in need of assistance that live in one of the most prosperous regions in the country. It also must be recognized that the region's high cost of housing can be burdensome for both the low and moderate income households (earning up to $150,000), particularly first time home buyers , so there is a significant need for more affordable housing. For further information on the affordable housing needs for the middle-income, see the NVRC report Shifting Migration Patterns of Northern Virginia: Affordable Housing Needs published January 2025. One-Year Estimates - Current Those jurisdictions with a population of 65,000 or more are included in the one-year American Community Survey estimates, of which there are five Northern Virginia jurisdictions included. The share of households in each income cohort for the five largest jurisdictions in Northern Virginia are shown in this graph. The Northern Virginia regional household income distribution, for the one-year estimates, is representative of the five largest jurisdictions in Northern Virginia only. While Northern Virginia is known for having communities with some of the highest median incomes in the United States, it must be recognized that there are segments of the community in need of assistance that live in one of the most prosperous regions in the country. It also must be recognized that the region's high cost of housing can be burdensome for both the low and moderate income households (earning up to $150,000), particularly first time home buyers, so there is a significant need for more affordable housing. For further information on the affordable housing needs for the middle-income, see the NVRC report Shifting Migration Patterns of Northern Virginia: Affordable Housing Needs published January 2025.

Language spoken and Limited English Proficiency LEP)information compiled by the Northern Virginia Regional Commission's as part of the One Region immigration study, Coronavirus (COVID-19) immigration study, and data dashboard to assess the economic impact of immigrants in Northern Virginia. Language Spoken Key Facts Language Spoken Understanding the population with language barriers is particularly critical for the quick and accurate dissemination of health, safety, and public information. 2014 to 2018 Five-Year Estimates Key Facts: There are an estimated 584,000 people in Northern Virginia who live in a household where English is not spoken at home as the primary language. Of those, 31.2 percent of the population age five and over speak Spanish at home. Of those, the second most spoken language is Korean at 5.5 percent. There are an estimated 134,200 people in Northern Virginia who report speaking English less than well, making up 5.4 percent of the region's total population.

Northern Virginia town economically disadvantaged populations, poverty, free and reduced price school meal (FARM) student and more demographics, data and graphs. Analyzed by the Northern Virginia Regional Commission (NVRC). Safety Net Participants Overall Reports, maps, and charts are best viewed on a desktop or tablet. Safety Net Participants While Northern Virginia is known for having communities with some of the highest median incomes in the United States, we must recognize that there are segments of the community in need of assistance that live in one of the most prosperous regions in the country. Affordable Care Act The Affordable Care Act (ACA) is the comprehensive health care reform law enacted in March 2010. More than 151,000 residents in Northern Virginia in 2024 received health insurance through the Affordable Care Act. Supplemental Nutrition Assistance Program The Supplemental Nutrition Assistance Program (SNAP) expenditures in Northern Virginia from 2011 to 2024 are shown in this graph, and the participants are shown in the tables below. Since 2011, the peak amount of expenditures was reached in 2022 due to the COVID-19 pandemic and its economic downturn. The COVID-19 pandemic hit the world and its impact on the Northern Virginia region was significant from a health and economic standpoint. The temporary boost to SNAP benefits put in place during the COVID-19 pandemic, known as emergency allotments, ended nationwide after the February 2023 issuance. Temporary Assistance for Needy Families Program The Temporary Assistance for Needy Families (TANF) and TANF-UP (TANF Unemployed-Families) expenditures in Northern Virginia from 2019 to 2024 are shown in this graph, and the participants are shown in the tables below. Since 2019, the peak amount of expenditures was reached in 2022 due to the COVID-19 pandemic and its economic downturn. The COVID-19 pandemic hit the world and its impact on the Northern Virginia region was significant from a health and economic standpoint. For additional information on the TANF and TANF-UP programs view the Virginia Department of Social Services's TANF program flyer . Medicaid Expansion The Medicaid Expansion Dashboard, which is maintained by the Virginia Department Medical Assistance Services , shows new health coverage for adults by overall enrollment, age, gender, family income, locality and region of residence.

Northern Virginia town income, economically disadvantage populations, and more demographics, data and graphs. Analyzed by the Northern Virginia Regional Commission (NVRC). Median Household Income of Towns Reports, maps, and charts are best viewed on a desktop or tablet. Median Household Income of Towns Northern Virginia is known for having communities with some of the highest median incomes in the United States, including the county with the highest in the nation. High median household incomes coincide with the large, thriving business community of the Northern Virginia region. While the median household income is high, it must be recognized that there are segments of the community in need of assistance that live in this prosperous region of the country and that high housing costs offset the high income when it comes to standards of living and well-being. Median Household Income - Current The median household income of the counties, cities, and incorporated towns in Northern Virginia is shown in this graph. Loudoun County is the number one ranked county (county equivalent) for median household income in the nation. The towns of Vienna and Clifton have estimated median household incomes even greater than Loudoun County. All Northern Virginia counties, cities and town, have a median household income higher than Virginia and the USA, except for the Towns of Dumfries and Quantico which are lower. Median Household Income - Historic Compared to Current Note, the American Community Survey is a survey with a small sample size. Due to the small population of many towns, the median household income of towns for should be used with caution and the margin of error of the median household income should be taken into consideration. If there is a large increase or decrease in the estimate from one time period to the next, and the margin of error is large and overlaps other periods, then the large change between time periods is likely due to statistical sampling error and the data should be used with caution. The margin of error is shown in the popup that is displayed when hovering over a bar in the bar charts. In addition to the margin of error, the accuracy of the American Community Survey data for an area can be gaged by evaluating the trend. If the data does not have a clear trend, and the margin of error is large and overlaps other periods, then the large change between time periods is likely due to statistical sampling error and the data should be used with caution.