Boundary Atlas

ZIP code 50312: Des Moines, IA

ZIP code 50312 is in Des Moines, in Polk County, Iowa. It is in Iowa's 3rd congressional district. Its state senate districts are State Senate District 18 (94%) and State Senate District 17 (5.7%); its state house districts are State House District 36 (91%), State House District 34 (5.7%) and State House District 35 (3.2%).

15,485residents (2020 Census)
5.6 sq miland area
1cities and towns
1congressional district
7voting precincts

See it on the mapAll of Iowa

City and county

City or townShare of ZIP residents
Des Moines100%

CountyShare of ZIP residents
Polk County100%

Town or county subdivisionShare of ZIP residents
Des Moines township99%
Walnut township0.6%

Congressional district

Congressional districtShare of ZIP residents
Iowa's 3rd congressional district (IA-03)100%

Elected officials

OfficeMemberContactShare of residents
U.S. Representative (IA-03)Zachary Nunn (R)202-225-5476100%
U.S. SenatorChuck Grassley (R)202-224-3744 · contact formstatewide
U.S. SenatorJoni Ernst (R)202-224-3254 · contact formstatewide
State Senator (State Senate District 18)Janet Petersen (Democratic)94%
State Senator (State Senate District 17)Izaah Knox (Democratic)5.7%
State Representative (State House District 36)Austin Baeth (Democratic)91%
State Representative (State House District 34)Rob Johnson (Democratic)5.7%
State Representative (State House District 35)Sean Bagniewski (Democratic)3.2%

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).

Local government

State legislative districts

State senate districtShare of ZIP residents
State Senate District 1894%
State Senate District 175.7%

State house districtShare of ZIP residents
State House District 3691%
State House District 345.7%
State House District 353.2%

Voting precincts

7 voting precincts overlap ZIP 50312. Map them, with each precinct's share of the ZIP's residents.

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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:50312")

ZIP 50312 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.