
Plainfield township
- County:
- Iosco County
- County Seat:
- No
- Area (mi²):
- 103.734
- State:
- Michigan
Plainfield township is located in Iosco County, Michigan. Plainfield township has a 2025 population of 3,329. Plainfield township is currently declining at a rate of -0.42% annually and its population has decreased by -0.69% since the most recent census, which recorded a population of 3,352 in 2020.
The average household income in Plainfield township is $61,649 with a poverty rate of 20.74%. The median age in Plainfield township is 61.2 years: 61.1 years for males, and 61.4 years for females.