
Fitchburg
- County:
- Worcester County
- County Seat:
- No
- Area (mi²):
- 27.824
- State:
- Massachusetts
Fitchburg is a city located in Worcester County, Massachusetts. Fitchburg has a 2025 population of 41,515. Fitchburg is currently declining at a rate of -0.08% annually and its population has decreased by -0.38% since the most recent census, which recorded a population of 41,675 in 2020.
The average household income in Fitchburg is $90,269 with a poverty rate of 15.49%. The median age in Fitchburg is 37.5 years: 38.5 years for males, and 36.8 years for females.