DuPage County Flag

DuPage County

State:
Illinois
County Seat:
Wheaton

DuPage County's 2026 population is estimated at 953,066, reflecting a 0.84% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). DuPage County is the 2nd largest county in Illinois. The 2010 population was 917,996 and has grown 3.82% since 2010.

953,066
Total Population
2,906
Population Density (mi²)
2
Population Rank (State)
8K 0.84%
Annual Population Growth

DuPage County Population

Demographics

Economics and Income Statistics