Boundary Atlas

ZIP code 51647: Northboro, IA

ZIP code 51647 is in Northboro (30% of residents), in Page County (79%) and Fremont County (21%), Iowa. 70% of its residents live outside city limits. It is in Iowa's 3rd congressional district (79%) and Iowa's 4th congressional district (21%). Its state senate districts are State Senate District 9 (79%) and State Senate District 8 (21%); its state house districts are State House District 18 (79%) and State House District 16 (21%).

173residents (2020 Census)
25.0 sq miland area
1cities and towns
2congressional districts
2voting precincts

See it on the mapAll of Iowa

City and county

City or townShare of ZIP residents
Northboro30%

CountyShare of ZIP residents
Page County79%
Fremont County21%

Town or county subdivisionShare of ZIP residents
Washington township79%
Locust Grove township21%

Congressional districts

Congressional districtShare of ZIP residents
Iowa's 3rd congressional district (IA-03)79%
Iowa's 4th congressional district (IA-04)21%

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)202-225-547679%
U.S. Representative (IA-04)Randy Feenstra (R)202-225-442621%
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)79%
State Senator (State Senate District 8)Mark Costello (R)21%
State Representative (State House District 18)Tom Moore (R)79%
State Representative (State House District 16)David Sieck (R)21%

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 979%
State Senate District 821%

State house districtShare of ZIP residents
State House District 1879%
State House District 1621%

Voting precincts

2 voting precincts overlap ZIP 51647. 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:

related_geographies(id="us:zcta:51647")

ZIP 51647 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.