Parker School is a census-designated place (CDP) in Hill and Chouteau counties in the U.S. state of Montana.

The CDP is part of the Rocky Boy Indian Reservation.

According to the United States Census Bureau, the CDP has a total area of 7.4 square miles (19.1 km2), all land.

The racial makeup of the CDP was 97.73% Native American, 1.99% White, and 0.28% Pacific Islander.

10.3% of all households were made up of individuals, and 1.3% had someone living alone who was 65 years of age or older.