
Waukegan
- County:
- Lake County
- County Seat:
- Yes
- Area (mi²):
- 24.217
- State:
- Illinois
Waukegan is a city located in Lake County, Illinois. Waukegan has a 2025 population of 86,657. It is also the county seat of Lake County. Waukegan is currently declining at a rate of -0.56% annually and its population has decreased by -2.76% since the most recent census, which recorded a population of 89,119 in 2020.
The average household income in Waukegan is $89,220 with a poverty rate of 15.33%. The median age in Waukegan is 34.6 years: 34.5 years for males, and 34.6 years for females.