Fairfield township
- County:
- Wayne County
- County Seat:
- No
- Area (mi²):
- 36.4
- State:
- Illinois
Fairfield township is located in Wayne County, Illinois. Fairfield township has a 2026 population of 359. Fairfield township is currently declining at a rate of -0.83% annually and its population has decreased by -2.45% since the most recent census, which recorded a population of 368 in 2020.
The median household income in Fairfield township is $100,250 with a poverty rate of 0%. The median age in Fairfield township is 66.9 years: 65.9 years for males, and 67.8 years for females. For every 100 females there are 79.1 males.