ZIP code 15243: Mount Lebanon, PA
ZIP code 15243 is in Mount Lebanon (60% of residents), in Allegheny County, Pennsylvania. 40% of its residents live outside city limits. It is in Pennsylvania's 17th congressional district (97%) and Pennsylvania's 12th congressional district (3.0%). Its state senate districts are State Senate District 42 (97%) and State Senate District 37 (3.0%); its state house districts are State House District 42 (63%) and State House District 27 (37%).
See it on the mapAll of Pennsylvania
City and county
| City or town | Share of ZIP residents |
|---|---|
| Mount Lebanon | 60% |
| County | Share of ZIP residents |
|---|---|
| Allegheny County | 100% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Mount Lebanon municipality | 60% |
| Scott township | 37% |
| Upper St. Clair township | 3.0% |
Congressional districts
| Congressional district | Share of ZIP residents |
|---|---|
| Pennsylvania's 17th congressional district (PA-17) | 97% |
| Pennsylvania's 12th congressional district (PA-12) | 3.0% |
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 (PA-17) | Christopher R. Deluzio (D) | 202-225-2301 | 97% |
| U.S. Representative (PA-12) | Summer L. Lee (D) | 202-225-2135 | 3.0% |
| U.S. Senator | David McCormick (R) | 202-224-6324 · contact form | statewide |
| U.S. Senator | John Fetterman (D) | 202-224-4254 · contact form | statewide |
| State Senator (State Senate District 42) | Wayne Fontana (Democratic) | 412-331-1208 | 97% |
| State Senator (State Senate District 37) | Devlin Robinson (R) | 412-643-3020 | 3.0% |
| State Representative (State House District 42) | Jen Mazzocco (Democratic) | 412-343-3870 | 63% |
| State Representative (State House District 27) | Dan Deasy (Democratic) | 412-928-9514 | 37% |
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
- Mount Lebanon laws: search for the Mount Lebanon, Pennsylvania code of ordinances
- Allegheny County website: https://www.alleghenycounty.us/Home
- Allegheny County laws: search for the Allegheny County, Pennsylvania code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 42 | 97% |
| State Senate District 37 | 3.0% |
| State house district | Share of ZIP residents |
|---|---|
| State House District 42 | 63% |
| State House District 27 | 37% |
Voting precincts
21 voting precincts overlap ZIP 15243. 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:15243")
ZIP 15243 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.