Boundary Atlas

ZIP code 50257: Truro, IA

ZIP code 50257 is in Truro (49% of residents), in Madison County (91%), Clarke County (6.3%) and Warren County (3.0%), Iowa. 51% of its residents live outside city limits. It is in Iowa's 3rd congressional district (97%) and Iowa's 1st congressional district (3.0%). Its state senate districts are State Senate District 12 (97%) and State Senate District 11 (3.0%); its state house districts are State House District 23 (91%), State House District 24 (5.9%) and State House District 22 (3.0%).

1,039residents (2020 Census)
43.8 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
Truro49%

CountyShare of ZIP residents
Madison County91%
Clarke County6.3%
Warren County3.0%

Town or county subdivisionShare of ZIP residents
Ohio township90%
Washington township5.9%
Virginia township3.0%
Walnut township0.9%
Madison township0.5%

Congressional districts

Congressional districtShare of ZIP residents
Iowa's 3rd congressional district (IA-03)97%
Iowa's 1st congressional district (IA-01)3.0%

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)202-225-547697%
U.S. Representative (IA-01)Mariannette Miller-Meeks (R)202-225-65763.0%
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 12)Amy Sinclair (R)97%
State Representative (State House District 23)Bubba Sorensen (R)91%
State Representative (State House District 24)Sam Wengryn (R)5.9%
State Representative (State House District 22)Samantha Fett (R)3.0%

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 1297%
State Senate District 113.0%

State house districtShare of ZIP residents
State House District 2391%
State House District 245.9%
State House District 223.0%

Voting precincts

4 voting precincts overlap ZIP 50257. 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:50257")

ZIP 50257 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.