Fairfield township
- County:
- Russell County
- County Seat:
- No
- Area (mi²):
- 40.203
- State:
- Kansas
Fairfield township is located in Russell County, Kansas. Fairfield township has a 2026 population of 24. Fairfield 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 24 in 2020.