Will County Flag

Will County

State:
Illinois
County Seat:
Joliet

Will County's estimated 2025 population is 706,092 with a growth rate of 0.38% in the past year according to the most recent United States census data. Will County is the 4th largest county in Illinois. The 2010 population was 678,829 and has seen a growth of 4.02% since that time.

706,092
Total Population
845
Population Density (mi²)
4
Population Rank (State)
2.7K 0.38%
Annual Population Growth

Will County Population

Demographics

Economics and Income Statistics