ZIP code 57049: Dakota Dunes, SD
ZIP code 57049 is in Dakota Dunes (52% of residents) and North Sioux City (39%), in Union County, South Dakota. 8.7% of its residents live outside city limits. It is in South Dakota's at-large congressional district. Its state senate district is State Senate District 17; its state house district is State House District 17.
See it on the mapAll of South Dakota
City and county
| City or town | Share of ZIP residents |
|---|---|
| Dakota Dunes | 52% |
| North Sioux City | 39% |
| County | Share of ZIP residents |
|---|---|
| Union County | 100% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Big Sioux township | 61% |
| North Sioux City city | 39% |
Congressional district
| Congressional district | Share of ZIP residents |
|---|---|
| South Dakota's at-large congressional district (SD-AL) | 100% |
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| Mayor | Patricia Teel | 39% | |
| U.S. Representative (SD-AL) | Dusty Johnson (R) | 202-225-2801 | 100% |
| U.S. Senator | John Thune (R) | 202-224-2321 · contact form | statewide |
| U.S. Senator | Mike Rounds (R) | 202-224-5842 · contact form | statewide |
| State Senator (State Senate District 17) | Sydney Davis (R) | 100% | |
| State Representative (State House District 17) | Chris Kassin (R) | 100% | |
| State Representative (State House District 17) | William Shorma (R) | 100% |
From Wikidata (community-maintained); confirm on the city's website.
Officials serving now (members of Congress until January 3, 2027). Sources: State legislators: Open States (public domain); Members of Congress: the @unitedstates project, congress-legislators (CC0); Mayors: Wikidata (CC0).
Local government
- Dakota Dunes laws: search for the Dakota Dunes, South Dakota code of ordinances
- North Sioux City website: http://northsiouxcity-sd.gov
- North Sioux City laws: search for the North Sioux City, South Dakota code of ordinances
- Union County website: http://unioncountysd.org
- Union County laws: search for the Union County, South Dakota code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 17 | 100% |
| State house district | Share of ZIP residents |
|---|---|
| State House District 17 | 100% |
Voting precincts
3 voting precincts overlap ZIP 57049. 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:57049")
ZIP 57049 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.