Greenfield
- County:
- Monterey County
- County Seat:
- No
- Area (mi²):
- 2.973
- State:
- California
Greenfield is a city located in Monterey County, California. Greenfield has a 2026 population of 21,042. Greenfield is currently growing at a rate of 1.34% annually and its population has increased by 11.03% since the most recent census, which recorded a population of 18,951 in 2020.