Data study
The Most Diverse Cities in America (2025), Mapped
We scored every large U.S. city on a racial-diversity index from 2024 Census data. The most diverse big city in America isn’t New York or LA — it’s Vallejo, California. Here’s the ranking, plus an interactive map of how diversity actually looks, block by block.
Key takeaways
- The most diverse big city in America is Vallejo, California — not New York or Los Angeles.
- The top of the list is dominated by Northern California (Vallejo, Oakland, Sacramento, Fairfield) and the New York metro (Jersey City, New York City).
- The least diverse large cities are near-monolithic — East LA, Hialeah, Laredo and Brownsville are each about 95% Hispanic.
- Diversity isn’t only a number. The interactive map below shows how it actually looks, block by block.
America is diversifying fast, but it isn’t diversifying evenly — and the cities you’d expect to top a “most diverse” list often don’t. To rank them honestly, we scored every city of 100,000+ on a diversity index: the probability that two randomly chosen residents are of a different race or ethnicity. It runs from 0 (everyone is the same group) to about 0.8 (a near-perfect mix). The numbers come from the U.S. Census Bureau’s 2024 American Community Survey, the same data behind every CensusFlow city page.
The 10 most diverse big cities in America
| Rank | City | Diversity index | Largest group |
|---|---|---|---|
| 1 | Vallejo, CA | 0.783 | Hispanic 30% |
| 2 | Oakland, CA | 0.773 | Hispanic 29% |
| 3 | Jersey City, NJ | 0.770 | Asian 27% |
| 4 | Sacramento, CA | 0.768 | Hispanic 29% |
| 5 | Fairfield, CA | 0.766 | Hispanic 33% |
| 6 | Brockton, MA | 0.764 | Black 34% |
| 7 | Elk Grove, CA | 0.762 | Asian 31% |
| 8 | Antioch, CA | 0.761 | Hispanic 36% |
| 9 | New York, NY | 0.758 | White 31% |
| 10 | Spring Valley, NV | 0.756 | White 36% |
What unites the leaders is balance. Vallejo, a working-class city on San Francisco Bay, is the rare place where four groups each hold roughly a fifth to a third of the population — Hispanic, Asian, White and Black residents living in genuinely comparable numbers. That even split, not the presence of any single large minority, is what pushes a city to the top of the index.
What diversity looks like, block by block
A diversity score tells you the mix, but not the map. Two cities can have identical scores while one is thoroughly intermixed and the other is split into single-race neighborhoods. So here is New York City — the most diverse of the country’s giant cities — rendered as a racial dot map. Every dot is a group of people, placed in their 2020 Census block and colored by race or ethnicity. Drag to explore Harlem, Washington Heights, Flushing, Sunset Park, Borough Park and the rest of the mosaic.
The map makes the point that no statistic can: New York is diverse and sharply patterned. Citywide it’s 31% White, 29% Hispanic, 20% Black and 15% Asian — but those groups cluster into neighborhoods with histories you can read straight off the dots.
The least diverse big cities
At the other end are cities where one group is almost everyone. Four of the five least-diverse large cities are overwhelmingly Hispanic border and gateway communities:
| City | Diversity index | Dominant group |
|---|---|---|
| East Los Angeles, CA | 0.087 | Hispanic 96% |
| Hialeah, FL | 0.094 | Hispanic 95% |
| Laredo, TX | 0.095 | Hispanic 95% |
| Brownsville, TX | 0.114 | Hispanic 94% |
| South Fulton, GA | 0.187 | Black 90% |
One entry on this list is misleading. Dearborn, Michigan registers as ~87% White and barely diverse — yet it’s home to one of the largest Arab-American communities in the country. The quirk is in the form, not the city: the Census Bureau has long classified people of Middle Eastern and North African descent as “White,” so Dearborn’s Lebanese, Yemeni and Iraqi residents disappear into that category. It’s a useful reminder that these categories are administrative, not natural.
Explore any city’s diversity yourself
Every CensusFlow city page includes a race & ethnicity breakdown and its own racial dot map, built from the same 2020 Census blocks. Curious how your city compares to Vallejo’s near-perfect balance — or to New York’s patterned mosaic? Search any place and scroll to “Race & ethnicity.” For more on how Americans sort across cities, see our companion studies on the youngest and oldest cities and the richest and poorest cities in the country.