Boundary Atlas

ZIP code 51638: Essex, IA

ZIP code 51638 is in Essex (61% of residents), in Page County (99%) and Montgomery County (1.3%), Iowa. 39% of its residents live outside city limits. It is in Iowa's 3rd congressional district. Its state senate district is State Senate District 9; its state house district is State House District 18.

1,189residents (2020 Census)
80.4 sq miland area
1cities and towns
1congressional district
4voting precincts

See it on the mapAll of Iowa

City and county

City or townShare of ZIP residents
Essex61%

CountyShare of ZIP residents
Page County99%
Montgomery County1.3%

Town or county subdivisionShare of ZIP residents
Pierce township76%
Fremont township13%
Tarkio township6.3%
Grant township3.0%
West township1.3%
Douglas township0.5%

Congressional district

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

Elected officials

OfficeMemberContactShare of residents
U.S. Representative (IA-03)Zachary Nunn (R)202-225-5476100%
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 Representative (State House District 18)Tom Moore (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 9100%

State house districtShare of ZIP residents
State House District 18100%

Voting precincts

4 voting precincts overlap ZIP 51638. Map them, with each precinct's share of the ZIP's residents.

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ZIP 51638 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.