Windsor
- County:
- Sonoma County
- County Seat:
- No
- Area (mi²):
- 7.436
- State:
- California
Windsor is a town located in Sonoma County, California. Windsor has a 2026 population of 25,846. Windsor is currently declining at a rate of -0.21% annually and its population has decreased by -1.89% since the most recent census, which recorded a population of 26,344 in 2020.