Boundary Atlas

ZIP code 50638: Grundy Center, IA

ZIP code 50638 is in Grundy Center (82% of residents), in Grundy County, Iowa. 18% of its residents live outside city limits. It is in Iowa's 2nd congressional district. Its state senate district is State Senate District 27; its state house district is State House District 54.

3,411residents (2020 Census)
94.0 sq miland area
1cities and towns
1congressional district
6voting precincts

See it on the mapAll of Iowa

City and county

City or townShare of ZIP residents
Grundy Center82%

CountyShare of ZIP residents
Grundy County100%

Town or county subdivisionShare of ZIP residents
Palermo township89%
Washington township4.0%
Lincoln township3.0%
Colfax township1.7%
Melrose township1.6%
Clay township0.4%

Congressional district

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

Elected officials

OfficeMemberContactShare of residents
U.S. Representative (IA-02)Ashley Hinson (R)202-225-2911100%
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)100%
State Representative (State House District 54)Josh Meggers (R)100%

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 27100%

State house districtShare of ZIP residents
State House District 54100%

Voting precincts

6 voting precincts overlap ZIP 50638. 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 50638 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.