Grass Ranch Colony is a Hutterite colony[4] and census-designated place (CDP) in Brule County, South Dakota, United States.

The population was 14 at the 2020 census.

[5] It was first listed as a CDP prior to the 2020 census.

[2] It is in the southeast part of the county, 11 miles (18 km) southeast of Kimball.

This South Dakota state location article is a stub.