The tracts that stand out.
The Census Bureau divides the country into 84,000+ small, stable neighborhoods called tracts — each one 1,200 to 8,000 residents. Here are the ones at the extremes.
Where the most people live inside a single tract boundary.
Highest residents per square mile. Manhattan dominates.
Median household income, latest ACS 5-year.
Median value of owner-occupied homes.
Share of adults 25+ with a bachelor's degree or higher.
Smallest share of residents below the poverty line.
Every list, with state breakdowns
24 rankings across the full ACS — each one available nationally and filtered to any of the 50 states.
All numbers come from the latest Census Bureau ACS 5-year release for each tract. Tract boundaries follow the 2024 TIGER/Line vintage. Population-based lists exclude tracts under 1,000 residents to filter out airports, parks, and industrial zones with statistical noise.
Open the interactive tract map → or browse city + county + metro rankings.