ZIP code 16040: Washington, PA
ZIP code 16040 is in Butler County, Pennsylvania, outside any city or Census-designated place. It is in Pennsylvania's 16th congressional district. Its state senate district is State Senate District 21; its state house district is State House District 17.
See it on the mapAll of Pennsylvania
City and county
Outside any city or Census-designated place.
| County | Share of ZIP residents |
|---|---|
| Butler County | 100% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Washington township | 50% |
| Venango township | 44% |
| Cherry township | 4.0% |
| Marion township | 2.3% |
Congressional district
| Congressional district | Share of ZIP residents |
|---|---|
| Pennsylvania's 16th congressional district (PA-16) | 100% |
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (PA-16) | Mike Kelly (R) | 202-225-5406 | 100% |
| 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 | 100% |
| State Representative (State House District 17) | Tim Bonner (R) | 724-458-4911 | 100% |
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
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 21 | 100% |
| State house district | Share of ZIP residents |
|---|---|
| State House District 17 | 100% |
Voting precincts
4 voting precincts overlap ZIP 16040. 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:16040")
ZIP 16040 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.