Brentwood Colony is a Hutterite colony and census-designated place (CDP) in Faulk County, South Dakota, United States. The population was 116 at the 2020 census. It was first listed as a CDP prior to the 2020 census.
It is in the northwest part of the county, by road northwest of Faulkton, the county seat, and southwest of Norbeck. Thunderbird Colony is by road to the northeast.