ZIP code 16055: Buffalo, PA
ZIP code 16055 is in Butler County (97%), Armstrong County (3.3%) and Allegheny County (<0.1%), Pennsylvania, outside any city or Census-designated place. It is in Pennsylvania's 16th congressional district (97%), Pennsylvania's 15th congressional district (3.3%) and Pennsylvania's 17th congressional district (<0.1%). Its state senate districts are State Senate District 21 (97%), State Senate District 41 (3.3%) and State Senate District 38 (<0.1%); its state house districts are State House District 11 (97%), State House District 60 (3.3%) and State House District 33 (<0.1%).
See it on the mapAll of Pennsylvania
City and county
Outside any city or Census-designated place.
| County | Share of ZIP residents |
|---|---|
| Butler County | 97% |
| Armstrong County | 3.3% |
| Allegheny County | <0.1% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Buffalo township | 80% |
| Clinton township | 7.5% |
| Winfield township | 6.8% |
| South Buffalo township | 3.2% |
| Jefferson township | 2.6% |
| North Buffalo township | <0.1% |
| Fawn township | <0.1% |
Congressional districts
| Congressional district | Share of ZIP residents |
|---|---|
| Pennsylvania's 16th congressional district (PA-16) | 97% |
| Pennsylvania's 15th congressional district (PA-15) | 3.3% |
| Pennsylvania's 17th congressional district (PA-17) | <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 (PA-16) | Mike Kelly (R) | 202-225-5406 | 97% |
| U.S. Representative (PA-15) | Glenn Thompson (R) | 202-225-5121 | 3.3% |
| U.S. Representative (PA-17) | Christopher R. Deluzio (D) | 202-225-2301 | <0.1% |
| 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 21) | Scott Hutchinson (R) | 814-677-6345 | 97% |
| State Senator (State Senate District 41) | Joe Pittman (R) | 724-357-0151 | 3.3% |
| State Senator (State Senate District 38) | Lindsey Williams (Democratic) | 412-364-0469 | <0.1% |
| State Representative (State House District 11) | Marci Mustello (R) | 724-283-5852 | 97% |
| State Representative (State House District 60) | Abby Major (R) | 724-763-3222 | 3.3% |
| State Representative (State House District 33) | Mandy Steele (Democratic) | 724-826-5151 | <0.1% |
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
- Butler County website: http://www.co.butler.pa.us
- Butler County laws: search for the Butler County, Pennsylvania code of ordinances
- Armstrong County website: http://www.co.armstrong.pa.us
- Armstrong County laws: search for the Armstrong County, Pennsylvania code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 21 | 97% |
| State Senate District 41 | 3.3% |
| State Senate District 38 | <0.1% |
| State house district | Share of ZIP residents |
|---|---|
| State House District 11 | 97% |
| State House District 60 | 3.3% |
| State House District 33 | <0.1% |
Voting precincts
10 voting precincts overlap ZIP 16055. 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:16055")
ZIP 16055 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.