Prince William County ranks among the 10 most diverse counties in America
Most places that call themselves diverse are really dominated by two groups. Prince William County, Virginia is one of the rare large counties that genuinely is not. It ranks 9th out of all 3,144 counties in the United States on the CensusEasy Diversity Score, with white, Hispanic, Black, and Asian residents split more evenly than almost anywhere else in the country. And it got there fast: in 1990 the Washington exurb was 83.5 percent white.
How Prince William's population changed
| # | Group | 1990 | 2024 |
|---|---|---|---|
| 1 | White, non-Hispanic | 83.5% | 37.9% |
| 2 | Hispanic | 4.2% | 26.1% |
| 3 | Black | 11.6% | 19.6% |
| 4 | Asian | 3.2% | 9.9% |
*Hispanic is an ethnicity that can be of any race, so these figures overlap and do not sum to 100 percent.
This is the balance the diversity index rewards. No one group holds even 40 percent: the county is roughly 38 percent white, 26 percent Hispanic, 20 percent Black, and 10 percent Asian. Where Osceola County in Florida tipped decisively toward one community, Prince William is close to a four-way split, which is exactly why it ranks in the national top ten while much larger and more famous places do not. The Hispanic population, drawn to Manassas, Woodbridge, and the I-95 corridor, drove the biggest single change, but Black and Asian growth filled in the rest.
Diverse and well-off
Prince William combined that change with prosperity. Its median household income is $131,402, well above Virginia's $93,170, buoyed by the federal-government and contracting economy of the Washington DC region. More than a quarter of residents were born abroad. It is the same diverse-and-affluent profile as its wealthier neighbor Loudoun County, just with a more even demographic mix.
The growth that carried it
| Year | Population | Growth since 1990 |
|---|---|---|
| 1990 | 215,686 | baseline |
| 2000 | 280,813 | +30.2% |
| 2010 | 402,002 | +86.4% |
| 2020 | 482,204 | +123.6% |
| 2025 | 502,966 | +133.2% |
Prince William more than doubled since 1990, and the newcomers who arrived were far more varied than the county they joined, part of the broader diversification of the Washington suburbs and the national trend we track in which race is increasing the most in the United States. The same transformation swept its northern neighbor in the Gwinnett County, Georgia mold, one white-majority suburb after another turning into a genuine diverse mix.
Where Prince William ranks on our most diverse county ranking
At 9th of 3,144, Prince William is among the ten most diverse counties in the country. See the full list at most diverse counties, or explore Prince William County's full data profile and the wider Washington metro.
Sources
The Diversity Score is a CensusEasy original index, a Simpson diversity index over the five race and ethnicity shares rescaled from 0 to 100, documented on our methodology page. Race, ethnicity, income, and population figures are from the U.S. Census Bureau American Community Survey and the 1990 decennial census, with the 2025 population from the Census Bureau's Population Estimates Program. Full ranking: most diverse counties.
Census officials confirm entire datasets will disappear under the new privacy rule
At a statistical conference in Boston, Census Bureau officials confirmed the noise infusion ban will pull historically published datasets, with small populations hit hardest. Officials denied political motives while the OECD's chief statistician questioned the process.
Uninsured rates rose in 427 counties and fell in 65
New county health insurance estimates show deterioration outnumbering improvement six to one between 2023 and 2024, with children's coverage worsening in 185 counties against nine. The plateau after Obamacare's gains looks like it's tipping into a climb.
How to Find Age Demographics by ZIP Code
Median age swings from 74.9 to 18.2 between US ZIP codes. Here is where to look the figure up for any ZIP, why the under-18 and 65-plus shares tell you more, and what the extremes turn out to be.
Why is Prince William County considered so diverse?
Because no single group dominates. Prince William County, Virginia is roughly 38 percent white, 26 percent Hispanic, 20 percent Black, and 10 percent Asian, a near four-way split. That balance earns it 9th place out of 3,144 counties on the CensusEasy Diversity Score, which rewards evenness across groups.
How has Prince William County changed since 1990?
It was 83.5 percent white in 1990 and is 37.9 percent today. Its Hispanic population grew from 4.2 to 26.1 percent, Black from 11.6 to 19.6 percent, and Asian from 3.2 to 9.9 percent, while the county more than doubled to about 503,000 residents.
Is Prince William County affluent?
Yes. Its median household income is $131,402, well above Virginia's $93,170, supported by the federal-government and contracting economy of the Washington region. It shares the diverse-and-affluent profile of its wealthier neighbor Loudoun County, with a more even demographic mix.
