ZIP code 45242: Blue Ash, OH
ZIP code 45242 is in Blue Ash (38% of residents), Montgomery (36%), Kenwood (4.5%), The Village of Indian Hill (3.4%), Rossmoyne (2.0%) and Remington (1.4%), in Hamilton County, Ohio. 14% of its residents live outside city limits. It is in Ohio's 8th congressional district (89%) and Ohio's 1st congressional district (11%). Its state senate districts are State Senate District 7 (97%) and State Senate District 8 (3.4%); its state house districts are State House District 28 (97%) and State House District 27 (3.4%).
City and county
| City or town | Share of ZIP residents |
|---|---|
| Blue Ash | 38% |
| Montgomery | 36% |
| Kenwood | 4.5% |
| The Village of Indian Hill | 3.4% |
| Rossmoyne | 2.0% |
| Remington | 1.4% |
| Concorde Hills | 0.9% |
| Brecon | <0.1% |
| County | Share of ZIP residents |
|---|---|
| Hamilton County | 100% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Blue Ash city | 38% |
| Montgomery city | 36% |
| Sycamore township | 14% |
| Symmes township | 8.1% |
| The Village of Indian Hill city | 3.4% |
Congressional districts
| Congressional district | Share of ZIP residents |
|---|---|
| Ohio's 8th congressional district (OH-08) | 89% |
| Ohio's 1st congressional district (OH-01) | 11% |
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 |
|---|---|---|---|
| Mayor | Jill Cole | 38% | |
| Mayor | Ronald Messer | 36% | |
| U.S. Representative (OH-08) | Warren Davidson (R) | 202-225-6205 | 89% |
| U.S. Representative (OH-01) | Greg Landsman (D) | 202-225-2216 | 11% |
| 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 7) | Steve Wilson (R) | 97% | |
| State Senator (State Senate District 8) | Bill Blessing (R) | 3.4% | |
| State Representative (State House District 28) | Karen Brownlee (Democratic) | 97% | |
| State Representative (State House District 27) | Rachel Baker (Democratic) | 3.4% |
From Wikidata (community-maintained); confirm on the city's website.
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); Mayors: Wikidata (CC0).
Local government
- Blue Ash website: http://www.blueash.com/
- Blue Ash laws: search for the Blue Ash, Ohio code of ordinances
- Montgomery website: http://www.ci.montgomery.oh.us/
- Montgomery laws: search for the Montgomery, Ohio code of ordinances
- Kenwood laws: search for the Kenwood, 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 7 | 97% |
| State Senate District 8 | 3.4% |
| State house district | Share of ZIP residents |
|---|---|
| State House District 28 | 97% |
| State House District 27 | 3.4% |
Voting precincts
26 voting precincts overlap ZIP 45242. 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:45242")
ZIP 45242 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.