
Fairfax township
- County:
- Linn County
- County Seat:
- No
- Area (mi²):
- 30.441
- State:
- Iowa
Fairfax township is located in Linn County, Iowa. Fairfax township has a 2025 population of 4,540. Fairfax township is currently declining at a rate of 0% annually and its population has decreased by 0% since the most recent census, which recorded a population of 0 in 2020.
The average household income in Fairfax township is $169,721 with a poverty rate of 4.85%. The median age in Fairfax township is 40.7 years: 39.9 years for males, and 41.3 years for females.