Boundary Atlas

ZIP code 52301: Marengo, IA

ZIP code 52301 is in Marengo (65% of residents), in Iowa County (99%) and Benton County (0.5%), Iowa. 35% of its residents live outside city limits. It is in Iowa's 1st congressional district (99%) and Iowa's 2nd congressional district (0.5%). Its state senate districts are State Senate District 46 (99%) and State Senate District 42 (0.5%); its state house districts are State House District 91 (99%) and State House District 84 (0.5%).

3,745residents (2020 Census)
126.3 sq miland area
1cities and towns
2congressional districts
7voting precincts

See it on the mapAll of Iowa

City and county

City or townShare of ZIP residents
Marengo65%

CountyShare of ZIP residents
Iowa County99%
Benton County0.5%

Town or county subdivisionShare of ZIP residents
Marengo township64%
Washington township19%
Sumner township8.9%
Hilton township5.1%
Honey Creek township1.7%
Hartford township0.6%
St. Clair township0.5%
Pilot township0.4%
Lincoln township0.2%

Congressional districts

Congressional districtShare of ZIP residents
Iowa's 1st congressional district (IA-01)99%
Iowa's 2nd congressional district (IA-02)0.5%

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-01)Mariannette Miller-Meeks (R)202-225-657699%
U.S. Representative (IA-02)Ashley Hinson (R)202-225-29110.5%
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 46)Dawn Driscoll (R)99%
State Senator (State Senate District 42)Charlie McClintock (R)0.5%
State Representative (State House District 91)Judd Lawler (R)99%
State Representative (State House District 84)Tom Gerhold (R)0.5%

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 4699%
State Senate District 420.5%

State house districtShare of ZIP residents
State House District 9199%
State House District 840.5%

Voting precincts

7 voting precincts overlap ZIP 52301. 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:52301")

ZIP 52301 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.