Baldwinville is an unincorporated village and census-designated place (CDP) in the town of Templeton in Worcester County, Massachusetts, United States.

The name also refers to the local post office or railroad station.

[3] According to the United States Census Bureau, the CDP has a total area of 6.5 km2 (2.5 mi2), of which 6.4 km2 (2.5 mi2) is land and 0.1 km2 (0.04 mi2) (0.80%) is water.

The racial makeup of the CDP was 97.84% White, 0.16% Black or African American, 0.16% Native American, 0.49% Asian, 0.81% from other races, and 0.54% from two or more races.

[5] Of the 677 households 33.8% had children under the age of 18 living with them, 51.4% were married couples living together, 11.1% had a female householder with no husband present, and 31.3% were non-families.