Boundary Atlas

ZIP code 50112: Grinnell, IA

ZIP code 50112 is in Grinnell (81% of residents) and Oakland Acres (1.5%), in Poweshiek County (92%) and Jasper County (7.6%), Iowa. 18% of its residents live outside city limits. It is in Iowa's 2nd congressional district (92%) and Iowa's 1st congressional district (7.6%). Its state senate districts are State Senate District 27 (92%) and State Senate District 19 (7.6%); its state house districts are State House District 53 (92%) and State House District 38 (7.6%).

11,849residents (2020 Census)
182.2 sq miland area
2cities and towns
2congressional districts
9voting precincts

See it on the mapAll of Iowa

City and county

City or townShare of ZIP residents
Grinnell81%
Oakland Acres1.5%

CountyShare of ZIP residents
Poweshiek County92%
Jasper County7.6%

Town or county subdivisionShare of ZIP residents
Grinnell city81%
Rock Creek township4.7%
Grant township3.7%
Washington township3.4%
Chester township2.5%
Richland township1.4%
Hickory Grove township1.4%
Malcom township1.1%
Sheridan township0.7%
Pleasant township0.2%
Lynn Grove township0.1%

Congressional districts

Congressional districtShare of ZIP residents
Iowa's 2nd congressional district (IA-02)92%
Iowa's 1st congressional district (IA-01)7.6%

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-02)Ashley Hinson (R)202-225-291192%
U.S. Representative (IA-01)Mariannette Miller-Meeks (R)202-225-65767.6%
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 27)Annette Sweeney (R)92%
State Senator (State Senate District 19)Ken Rozenboom (R)7.6%
State Representative (State House District 53)Dean Fisher (R)92%

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 2792%
State Senate District 197.6%

State house districtShare of ZIP residents
State House District 5392%
State House District 387.6%

Voting precincts

9 voting precincts overlap ZIP 50112. 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:

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ZIP 50112 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.