ZIP code 45011: Hamilton, OH
ZIP code 45011 is in Hamilton (27% of residents) and New Miami (1.8%), in Butler County, Ohio. 71% of its residents live outside city limits. It is in Ohio's 8th congressional district (99%) and Ohio's 10th congressional district (1.3%). Its state senate districts are State Senate District 4 (98%) and State Senate District 5 (2.0%); its state house districts are State House District 47 (56%), State House District 46 (37%), State House District 45 (5.3%) and State House District 40 (2.0%).
City and county
| City or town | Share of ZIP residents |
|---|---|
| Hamilton | 27% |
| New Miami | 1.8% |
| Fairfield | 1.0% |
| Williamsdale | 0.8% |
| Woodsdale | 0.3% |
| County | Share of ZIP residents |
|---|---|
| Butler County | 100% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Liberty township | 31% |
| Fairfield township | 29% |
| Hamilton city | 27% |
| St. Clair township | 4.9% |
| West Chester township | 4.3% |
| Wayne township | 2.0% |
| Lemon township | 1.3% |
| Fairfield city | 1.0% |
Congressional districts
| Congressional district | Share of ZIP residents |
|---|---|
| Ohio's 8th congressional district (OH-08) | 99% |
| Ohio's 10th congressional district (OH-10) | 1.3% |
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 | 99% |
| U.S. Representative (OH-10) | Michael R. Turner (R) | 202-225-6465 | 1.3% |
| 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 4) | George Lang (R) | 98% | |
| State Senator (State Senate District 5) | Steve Huffman (R) | 2.0% | |
| State Representative (State House District 47) | Diane Mullins (R) | 56% | |
| State Representative (State House District 46) | Thomas Hall (R) | 37% | |
| State Representative (State House District 45) | Jennifer Gross (R) | 5.3% | |
| State Representative (State House District 40) | Rodney Creech (R) | 2.0% |
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
- Hamilton website: https://hamilton-oh.gov
- Hamilton laws: search for the Hamilton, Ohio code of ordinances
- New Miami laws: search for the New Miami, Ohio code of ordinances
- Butler County website: https://bcohio.gov
- Butler County laws: search for the Butler County, Ohio code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 4 | 98% |
| State Senate District 5 | 2.0% |
| State house district | Share of ZIP residents |
|---|---|
| State House District 47 | 56% |
| State House District 46 | 37% |
| State House District 45 | 5.3% |
| State House District 40 | 2.0% |
Voting precincts
64 voting precincts overlap ZIP 45011. 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:45011")
ZIP 45011 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.