ZIP code 50311: Des Moines, IA

ZIP code 50311 is in Des Moines, in Polk County, Iowa. It is in Iowa's 3rd congressional district. Its state senate districts are State Senate District 17 (67%) and State Senate District 18 (33%); its state house districts are State House District 34 (67%) and State House District 35 (33%).

14,782residents (2020 Census)

2.6 sq miland area

1cities and towns

1congressional district

8voting precincts

See it on the map All of Iowa

City and county

City or town	Share of ZIP residents
Des Moines	100%

County	Share of ZIP residents
Polk County	100%

Town or county subdivision	Share of ZIP residents
Des Moines township	100%

Congressional district

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

Elected officials

Office	Member	Contact	Share of residents
U.S. Representative (IA-03)	Zachary Nunn (R)	202-225-5476	100%
U.S. Senator	Chuck Grassley (R)	202-224-3744 · contact form	statewide
U.S. Senator	Joni Ernst (R)	202-224-3254 · contact form	statewide
State Senator (State Senate District 17)	Izaah Knox (Democratic)		67%
State Senator (State Senate District 18)	Janet Petersen (Democratic)		33%
State Representative (State House District 34)	Rob Johnson (Democratic)		67%
State Representative (State House District 35)	Sean Bagniewski (Democratic)		33%

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

Des Moines website: https://www.catchdesmoines.com/
Des Moines laws: search for the Des Moines, Iowa code of ordinances
Polk County website: https://www.polkcountyiowa.gov/
Polk County laws: search for the Polk County, Iowa code of ordinances

State legislative districts

State senate district	Share of ZIP residents
State Senate District 17	67%
State Senate District 18	33%

State house district	Share of ZIP residents
State House District 34	67%
State House District 35	33%

Voting precincts

8 voting precincts overlap ZIP 50311. 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:50311")

ZIP 50311 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.