Windsor is a town in Kennebec County, Maine, United States. The population was 2,632 at the 2020 census. Windsor is included in the Augusta, Maine micropolitan New England City and Town Area.

Kennebec County is a county located in the South-central portion of the U.S. state of Maine. At the 2020 census, the population was 123,642. Its county seat is Augusta, the state capital. The county was established on February 20, 1799, from portions of Cumberland and Lincoln Counties. The name Kennebec comes from the Eastern Abenaki /kínipekʷ/, meaning "large body of still water, large bay."