Plainfield
- County:
- Waushara County
- County Seat:
- No
- Area (mi²):
- 1.558
- State:
- Wisconsin
Plainfield is a village located in Waushara County, Wisconsin. Plainfield has a 2026 population of 920. Plainfield is currently declining at a rate of -0.76% annually and its population has decreased by -0.22% since the most recent census, which recorded a population of 922 in 2020.