Fitchburg
- County:
- Dane County
- County Seat:
- No
- Area (mi²):
- 35.212
- State:
- Wisconsin
Fitchburg is a city located in Dane County, Wisconsin. Fitchburg has a 2026 population of 34,357. Fitchburg is currently growing at a rate of 2.71% annually and its population has increased by 9.77% since the most recent census, which recorded a population of 31,300 in 2020.