Freeburg
- County:
- St. Clair County
- County Seat:
- No
- Area (mi²):
- 6.849
- State:
- Illinois
Freeburg is a village located in St. Clair County, Illinois. Freeburg has a 2026 population of 4,518. Freeburg is currently declining at a rate of -0.33% annually and its population has decreased by -1.85% since the most recent census, which recorded a population of 4,603 in 2020.
The median household income in Freeburg is $92,065 with a poverty rate of 6.67%. The median age in Freeburg is 45.6 years: 43.6 years for males, and 47.6 years for females. For every 100 females there are 96.2 males.