ZIP code 45304: Arcanum, OH
ZIP code 45304 is in Arcanum (31% of residents), Gordon (3.2%), Castine (1.5%) and Ithaca (1.1%), in Darke County (99%), Preble County (1.1%) and Miami County (0.3%), Ohio. 63% of its residents live outside city limits. It is in Ohio's 8th congressional district (100%) and Ohio's 15th congressional district (0.3%). Its state senate district is State Senate District 5; its state house districts are State House District 80 (99%) and State House District 40 (1.1%).
City and county
| City or town | Share of ZIP residents |
|---|---|
| Arcanum | 31% |
| Gordon | 3.2% |
| Castine | 1.5% |
| Ithaca | 1.1% |
| Pitsburg | 0.3% |
| County | Share of ZIP residents |
|---|---|
| Darke County | 99% |
| Preble County | 1.1% |
| Miami County | 0.3% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Twin township | 55% |
| Van Buren township | 14% |
| Monroe township | 13% |
| Franklin township | 9.8% |
| Butler township | 7.0% |
| Harrison township | 1.1% |
| Neave township | 0.4% |
| Union township | 0.3% |
Congressional districts
| Congressional district | Share of ZIP residents |
|---|---|
| Ohio's 8th congressional district (OH-08) | 100% |
| Ohio's 15th congressional district (OH-15) | 0.3% |
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-08) | Warren Davidson (R) | 202-225-6205 | 100% |
| U.S. Representative (OH-15) | Mike Carey (R) | 202-225-2015 | 0.3% |
| 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 5) | Steve Huffman (R) | 100% | |
| State Representative (State House District 80) | Johnathan Newman (R) | 99% | |
| State Representative (State House District 40) | Rodney Creech (R) | 1.1% |
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
- Arcanum website: http://villageofarcanum.com/
- Arcanum laws: search for the Arcanum, Ohio code of ordinances
- Gordon laws: search for the Gordon, Ohio code of ordinances
- Castine laws: search for the Castine, Ohio code of ordinances
- Darke County laws: search for the Darke County, Ohio code of ordinances
- Preble County website: http://www.prebco.org
- Preble County laws: search for the Preble County, Ohio code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 5 | 100% |
| State house district | Share of ZIP residents |
|---|---|
| State House District 80 | 99% |
| State House District 40 | 1.1% |
Voting precincts
10 voting precincts overlap ZIP 45304. 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:45304")
ZIP 45304 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.