ZIP code 45810: Ada, OH
ZIP code 45810 is in Ada (68% of residents), in Hardin County (94%), Allen County (2.9%) and Hancock County (2.7%), Ohio. 32% of its residents live outside city limits. It is in Ohio's 4th congressional district (97%) and Ohio's 5th congressional district (2.7%). Its state senate districts are State Senate District 1 (97%) and State Senate District 12 (2.9%); its state house districts are State House District 83 (97%) and State House District 78 (2.9%).
City and county
| City or town | Share of ZIP residents |
|---|---|
| Ada | 68% |
| County | Share of ZIP residents |
|---|---|
| Hardin County | 94% |
| Allen County | 2.9% |
| Hancock County | 2.7% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Liberty township | 90% |
| Jackson township | 2.9% |
| Orange township | 2.6% |
| Marion township | 2.1% |
| Washington township | 1.2% |
| Cessna township | 1.0% |
| Van Buren township | 0.1% |
Congressional districts
| Congressional district | Share of ZIP residents |
|---|---|
| Ohio's 4th congressional district (OH-04) | 97% |
| Ohio's 5th congressional district (OH-05) | 2.7% |
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
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (OH-04) | Jim Jordan (R) | 202-225-2676 | 97% |
| U.S. Representative (OH-05) | Robert E. Latta (R) | 202-225-6405 | 2.7% |
| U.S. Senator | Bernie Moreno (R) | 202-224-2315 | statewide |
| U.S. Senator | Jon Husted (R) | 202-224-3353 | statewide |
| State Senator (State Senate District 1) | Rob McColley (R) | 97% | |
| State Senator (State Senate District 12) | Susan Manchester (R) | 419-820-8151 | 2.9% |
| State Representative (State House District 83) | Ty Mathews (R) | 97% | |
| State Representative (State House District 78) | Matt Huffman (R) | 2.9% |
Elected in 2024 under OH's previous congressional map; this district's lines changed for the 120th Congress (seated January 3, 2027).
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
- Ada website: https://www.adaoh.org/
- Ada laws: search for the Ada, Ohio code of ordinances
- Hardin County laws: search for the Hardin County, Ohio code of ordinances
- Allen County laws: search for the Allen County, Ohio code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 1 | 97% |
| State Senate District 12 | 2.9% |
| State house district | Share of ZIP residents |
|---|---|
| State House District 83 | 97% |
| State House District 78 | 2.9% |
Voting precincts
10 voting precincts overlap ZIP 45810. Map them, with each precinct's share of the ZIP's residents.
Get this in your AI agent
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:45810")
ZIP 45810 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.