Boundary Atlas

ZIP code 50054: Colfax, IA

ZIP code 50054 is in Colfax (66% of residents) and Valeria (1.1%), in Jasper County, Iowa. 33% of its residents live outside city limits. It is in Iowa's 1st congressional district. Its state senate district is State Senate District 19; its state house district is State House District 38.

3,471residents (2020 Census)
61.0 sq miland area
2cities and towns
1congressional district
5voting precincts

See it on the mapAll of Iowa

City and county

City or townShare of ZIP residents
Colfax66%
Valeria1.1%

CountyShare of ZIP residents
Jasper County100%

Town or county subdivisionShare of ZIP residents
Washington township69%
Poweshiek township17%
Mound Prairie township12%
Sherman township2.5%

Congressional district

Congressional districtShare of ZIP residents
Iowa's 1st congressional district (IA-01)100%

Elected officials

OfficeMemberContactShare of residents
U.S. Representative (IA-01)Mariannette Miller-Meeks (R)202-225-6576100%
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 19)Ken Rozenboom (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 19100%

State house districtShare of ZIP residents
State House District 38100%

Voting precincts

5 voting precincts overlap ZIP 50054. Map them, with each precinct's share of the ZIP's residents.

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ZIP 50054 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.