Millbrook Colony, South Dakota

Millbrook Colony is a Hutterite colony and census-designated place (CDP) in Hanson County, South Dakota, United States. The population was 98 at the 2020 census. It was first listed as a CDP prior to the 2020 census.

It is in the western part of the county, 7 mi by road west-northwest of Alexandria, the county seat, and 10 mi east-southeast of Mitchell.