Boundary Atlas

ZIP code 50158: Marshalltown, IA

ZIP code 50158 is in Marshalltown (88% of residents), in Marshall County (100%) and Tama County (0.1%), Iowa. 12% of its residents live outside city limits. It is in Iowa's 4th congressional district (100%) and Iowa's 2nd congressional district (0.1%). Its state senate districts are State Senate District 26 (100%) and State Senate District 27 (0.1%); its state house districts are State House District 52 (94%), State House District 51 (6.4%) and State House District 53 (0.1%).

31,466residents (2020 Census)
212.2 sq miland area
1cities and towns
2congressional districts
15voting precincts

See it on the mapAll of Iowa

City and county

City or townShare of ZIP residents
Marshalltown88%

CountyShare of ZIP residents
Marshall County100%
Tama County0.1%

Town or county subdivisionShare of ZIP residents
Taylor township57%
Timber Creek township35%
Marion township2.2%
Le Grand township2.1%
Washington township1.0%
Marietta township0.7%
Liscomb township0.5%
Vienna township0.4%
Greencastle township0.3%
Jefferson township0.3%
Indian Village township0.1%

Congressional districts

Congressional districtShare of ZIP residents
Iowa's 4th congressional district (IA-04)100%
Iowa's 2nd congressional district (IA-02)0.1%

This ZIP is split between districts. A mailing address in it could be in either; the map or locate_point gives the district for an exact address.

Elected officials

OfficeMemberContactShare of residents
U.S. Representative (IA-04)Randy Feenstra (R)202-225-4426100%
U.S. Representative (IA-02)Ashley Hinson (R)202-225-29110.1%
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 26)Kara Warme (R)100%
State Senator (State Senate District 27)Annette Sweeney (R)0.1%
State Representative (State House District 52)David Blom (R)94%
State Representative (State House District 51)Brett Barker (R)6.4%
State Representative (State House District 53)Dean Fisher (R)0.1%

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 26100%
State Senate District 270.1%

State house districtShare of ZIP residents
State House District 5294%
State House District 516.4%
State House District 530.1%

Voting precincts

15 voting precincts overlap ZIP 50158. Map them, with each precinct's share of the ZIP's residents.

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ZIP 50158 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.