Boundary Atlas

ZIP code 51566: Red Oak, IA

ZIP code 51566 is in Red Oak (83% of residents), in Montgomery County (99%), Page County (0.5%) and Pottawattamie County (0.2%), Iowa. 17% of its residents live outside city limits. It is in Iowa's 3rd congressional district (100%) and Iowa's 4th congressional district (0.2%). Its state senate districts are State Senate District 9 (100%) and State Senate District 8 (0.2%); its state house districts are State House District 18 (100%) and State House District 16 (0.2%).

6,772residents (2020 Census)
176.4 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
Red Oak83%
Coburg0.4%

CountyShare of ZIP residents
Montgomery County99%
Page County0.5%
Pottawattamie County0.2%

Town or county subdivisionShare of ZIP residents
Red Oak township88%
Grant township4.1%
Sherman township1.7%
West township1.6%
Garfield township1.5%
Frankfort township1.3%
Pilot Grove township0.7%
Lincoln township0.5%
Fremont township0.5%
Waveland township0.2%
Pierce townshipland only

Congressional districts

Congressional districtShare of ZIP residents
Iowa's 3rd congressional district (IA-03)100%
Iowa's 4th congressional district (IA-04)0.2%

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-03)Zachary Nunn (R)202-225-5476100%
U.S. Representative (IA-04)Randy Feenstra (R)202-225-44260.2%
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 9)Tom Shipley (R)100%
State Senator (State Senate District 8)Mark Costello (R)0.2%
State Representative (State House District 18)Tom Moore (R)100%
State Representative (State House District 16)David Sieck (R)0.2%

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 9100%
State Senate District 80.2%

State house districtShare of ZIP residents
State House District 18100%
State House District 160.2%

Voting precincts

9 voting precincts overlap ZIP 51566. Map them, with each precinct's share of the ZIP's residents.

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ZIP 51566 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.