Barrett is a city in Grant County, Minnesota, United States. The population was 415 at the 2010 census. Troy Johnson is the mayor.
According to the United States Census Bureau, the city has a total area of 2.1 square miles (5.4 km²), of which, 2.1 square miles (5.3 km²) of it is land and 0.04 square miles (0.1 km²) of it (1.90%) is water.
The town of Barrett wraps around the southwest side of Barrett Lake, which is formed by the Pomme de Terre River.