Boundary Atlas

ZIP code 52320: Olin, IA

ZIP code 52320 is in Olin (60% of residents), in Jones County (96%) and Cedar County (3.7%), Iowa. 40% of its residents live outside city limits. It is in Iowa's 1st congressional district. Its state senate districts are State Senate District 33 (96%) and State Senate District 41 (3.7%); its state house districts are State House District 66 (96%) and State House District 82 (3.7%).

1,087residents (2020 Census)
58.1 sq miland area
1cities and towns
1congressional district
5voting precincts

See it on the mapAll of Iowa

City and county

City or townShare of ZIP residents
Olin60%

CountyShare of ZIP residents
Jones County96%
Cedar County3.7%

Town or county subdivisionShare of ZIP residents
Rome township72%
Hale township12%
Jackson township9.5%
Fremont township3.3%
Madison township2.8%
Dayton township0.4%

Congressional district

Congressional districtShare of ZIP residents
Iowa's 1st congressional district (IA-01)100%

Elected officials

OfficeMemberContactShare of residents
U.S. Representative (IA-01)Mariannette Miller-Meeks (R)202-225-6576100%
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 33)Carrie Koelker (R)96%
State Senator (State Senate District 41)Kerry Gruenhagen (R)3.7%
State Representative (State House District 66)Steve Bradley (R)96%
State Representative (State House District 82)Bobby Kaufmann (R)3.7%

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 3396%
State Senate District 413.7%

State house districtShare of ZIP residents
State House District 6696%
State House District 823.7%

Voting precincts

5 voting precincts overlap ZIP 52320. 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:

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ZIP 52320 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.