Boundary Atlas

ZIP code 51577: Walnut, IA

ZIP code 51577 is in Walnut (68% of residents), in Pottawattamie County (89%), Shelby County (11%) and Cass County (0.3%), Iowa. 32% of its residents live outside city limits. It is in Iowa's 4th congressional district (100%) and Iowa's 3rd congressional district (0.3%). Its state senate districts are State Senate District 8 (89%), State Senate District 6 (11%) and State Senate District 9 (0.3%); its state house districts are State House District 16 (89%), State House District 11 (11%) and State House District 18 (0.3%).

1,101residents (2020 Census)
83.6 sq miland area
1cities and towns
2congressional districts
4voting precincts

See it on the mapAll of Iowa

City and county

City or townShare of ZIP residents
Walnut68%

CountyShare of ZIP residents
Pottawattamie County89%
Shelby County11%
Cass County0.3%

Town or county subdivisionShare of ZIP residents
Layton township80%
Monroe township9.1%
Lincoln township8.0%
Clay township1.5%
Wright township0.7%
Brighton township0.3%

Congressional districts

Congressional districtShare of ZIP residents
Iowa's 4th congressional district (IA-04)100%
Iowa's 3rd congressional district (IA-03)0.3%

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-03)Zachary Nunn (R)202-225-54760.3%
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 8)Mark Costello (R)89%
State Senator (State Senate District 6)Jason Schultz (R)11%
State Senator (State Senate District 9)Tom Shipley (R)0.3%
State Representative (State House District 16)David Sieck (R)89%
State Representative (State House District 11)Craig Williams (R)11%
State Representative (State House District 18)Tom Moore (R)0.3%

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 889%
State Senate District 611%
State Senate District 90.3%

State house districtShare of ZIP residents
State House District 1689%
State House District 1111%
State House District 180.3%

Voting precincts

4 voting precincts overlap ZIP 51577. Map them, with each precinct's share of the ZIP's residents.

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ZIP 51577 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.