Swift Bird () is a census-designated place (CDP) on the Cheyenne River Indian Reservation in Dewey County, South Dakota, United States. It was first listed as a CDP prior to the 2020 census. The population of the CDP was 117 at the 2020 census.
It is in the eastern part of the county, on the south side of U.S. Route 212, northwest of the highway's bridge over Lake Oahe on the Missouri River. It is south of Swift Bird Bay on Lake Oahe, fed from the west by Swift Bird Creek. The community is west of Gettysburg and east of Eagle Butte.