Greenbush is a city in Roseau County, Minnesota, United States. The population was 719 at the 2010 census.
Minnesota State Highways 11 and 32 are two of the main arterial routes in the community.
The word Greenbush comes from "Sha Ach Wah," which means spruce tree or green bush in Ojibwe. Scandinavian, Polish and Bohemian settlers arrived in the area in 1880s, with the largest influx immigrating in the early 1890s. The Homestead Act gave 160 acres (0.65 km2) free to settlers if they set up living quarters and develop a few acres into the fields.