ZIP code 45013: Hamilton, OH
ZIP code 45013 is in Hamilton (61% of residents), Ross (3.0%), New Miami (1.6%) and Millville (1.2%), in Butler County (100%) and Hamilton County (<0.1%), Ohio. 33% of its residents live outside city limits. It is in Ohio's 8th congressional district (100%) and Ohio's 1st congressional district (<0.1%). Its state senate districts are State Senate District 4 (97%), State Senate District 5 (2.5%) and State Senate District 8 (<0.1%); its state house districts are State House District 47 (79%), State House District 45 (16%), State House District 46 (2.9%), State House District 40 (2.5%) and State House District 29 (<0.1%).
City and county
| City or town | Share of ZIP residents |
|---|---|
| Hamilton | 61% |
| Ross | 3.0% |
| New Miami | 1.6% |
| Millville | 1.2% |
| County | Share of ZIP residents |
|---|---|
| Butler County | 100% |
| Hamilton County | <0.1% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Hamilton city | 61% |
| Hanover township | 14% |
| Ross township | 13% |
| St. Clair township | 4.4% |
| Morgan township | 3.8% |
| Milford township | 2.1% |
| Reily township | 0.9% |
| Wayne township | 0.4% |
| Crosby township | <0.1% |
| Fairfield township | <0.1% |
Congressional districts
| Congressional district | Share of ZIP residents |
|---|---|
| Ohio's 8th congressional district (OH-08) | 100% |
| Ohio's 1st congressional district (OH-01) | <0.1% |
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-01) | Greg Landsman (D) | 202-225-2216 | <0.1% |
| 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) | 97% | |
| State Senator (State Senate District 5) | Steve Huffman (R) | 2.5% | |
| State Senator (State Senate District 8) | Bill Blessing (R) | <0.1% | |
| State Representative (State House District 47) | Diane Mullins (R) | 79% | |
| State Representative (State House District 45) | Jennifer Gross (R) | 16% | |
| State Representative (State House District 46) | Thomas Hall (R) | 2.9% | |
| State Representative (State House District 40) | Rodney Creech (R) | 2.5% | |
| State Representative (State House District 29) | Cindy Abrams (R) | <0.1% |
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
- Hamilton website: https://hamilton-oh.gov
- Hamilton laws: search for the Hamilton, Ohio code of ordinances
- Ross laws: search for the Ross, 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
- Hamilton County laws: search for the Hamilton County, Ohio code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 4 | 97% |
| State Senate District 5 | 2.5% |
| State Senate District 8 | <0.1% |
| State house district | Share of ZIP residents |
|---|---|
| State House District 47 | 79% |
| State House District 45 | 16% |
| State House District 46 | 2.9% |
| State House District 40 | 2.5% |
| State House District 29 | <0.1% |
Voting precincts
57 voting precincts overlap ZIP 45013. 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://boundarymcp.com/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:
related_geographies(id="us:zcta:45013")
ZIP 45013 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.