
Pittsfield
- County:
- Pike County
- County Seat:
- Yes
- Area (mi²):
- 4.782
- State:
- Illinois
Pittsfield is a city located in Pike County, Illinois. Pittsfield has a 2025 population of 4,008. It is also the county seat of Pike County. Pittsfield is currently declining at a rate of -0.79% annually and its population has decreased by -3.84% since the most recent census, which recorded a population of 4,168 in 2020.
The average household income in Pittsfield is $65,423 with a poverty rate of 15.74%. The median age in Pittsfield is 43.4 years: 39.4 years for males, and 48.4 years for females.