Boundary Atlas

ZIP code 57722: Buffalo Gap, SD

ZIP code 57722 is in Buffalo Gap (32% of residents), in Custer County (57%), Oglala Lakota County (34%) and Fall River County (9.4%), South Dakota. 68% of its residents live outside city limits. It is in South Dakota's at-large congressional district. Its state senate districts are State Senate District 30 (66%) and State Senate District 27 (34%); its state house districts are State House District 30 (66%) and State House District 27 (34%).

414residents (2020 Census)
544.7 sq miland area
1cities and towns
1congressional district
6voting precincts

See it on the mapAll of South Dakota

City and county

City or townShare of ZIP residents
Buffalo Gap32%

CountyShare of ZIP residents
Custer County57%
Oglala Lakota County34%
Fall River County9.4%

Town or county subdivisionShare of ZIP residents
West Oglala Lakota UT34%
Buffalo Gap town32%
East Custer UT25%
Northeast Fall River UT9.4%

Congressional district

Congressional districtShare of ZIP residents
South Dakota's at-large congressional district (SD-AL)100%

State legislative districts

State senate districtShare of ZIP residents
State Senate District 3066%
State Senate District 2734%

State house districtShare of ZIP residents
State House District 3066%
State House District 2734%

Voting precincts

6 voting precincts overlap ZIP 57722. Map them, with each precinct's share of the ZIP's residents.

Get this in your AI agent

Your agent can get these cities, counties, districts and precincts with their shares, and their GeoJSON boundaries, from Boundary Atlas. Add https://atlas-production-d344.up.railway.app/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:

related_geographies(id="us:zcta:57722")

ZIP 57722 here is the Census Bureau's ZIP Code Tabulation Area, which approximates the USPS ZIP Code; PO-box-only ZIPs have none. Districts are the maps in force for the November 3, 2026 election.