ZIP code 18031: Breinigsville, PA
ZIP code 18031 is in Breinigsville (66% of residents) and Trexlertown (16%), in Lehigh County (99%) and Berks County (0.8%), Pennsylvania. 18% of its residents live outside city limits. It is in Pennsylvania's 7th congressional district (99%) and Pennsylvania's 4th congressional district (0.8%). Its state senate districts are State Senate District 16 (99%) and State Senate District 24 (0.8%); its state house districts are State House District 187 (66%), State House District 132 (34%) and State House District 130 (0.8%).
See it on the mapAll of Pennsylvania
City and county
| City or town | Share of ZIP residents |
|---|---|
| Breinigsville | 66% |
| Trexlertown | 16% |
| County | Share of ZIP residents |
|---|---|
| Lehigh County | 99% |
| Berks County | 0.8% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Upper Macungie township | 95% |
| Weisenberg township | 3.9% |
| Longswamp township | 0.8% |
Congressional districts
| Congressional district | Share of ZIP residents |
|---|---|
| Pennsylvania's 7th congressional district (PA-07) | 99% |
| Pennsylvania's 4th congressional district (PA-04) | 0.8% |
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-07) | Ryan Mackenzie (R) | 202-225-6411 | 99% |
| U.S. Representative (PA-04) | Madeleine Dean (D) | 202-225-4731 | 0.8% |
| 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 16) | Jarrett Coleman (R) | 267-551-3744 | 99% |
| State Senator (State Senate District 24) | Tracy Pennycuick (R) | 215-541-2388 | 0.8% |
| State Representative (State House District 187) | Gary Day (R) | 610-965-9933 | 66% |
| State Representative (State House District 132) | Mike Schlossberg (Democratic) | 610-821-5577 | 34% |
| State Representative (State House District 130) | David Maloney (R) | 610-369-3010 | 0.8% |
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
- Breinigsville laws: search for the Breinigsville, Pennsylvania code of ordinances
- Trexlertown laws: search for the Trexlertown, Pennsylvania code of ordinances
- Lehigh County website: http://www.lehighcounty.org
- Lehigh County laws: search for the Lehigh County, Pennsylvania code of ordinances
- Berks County website: http://www.co.berks.pa.us
- Berks County laws: search for the Berks County, Pennsylvania code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 16 | 99% |
| State Senate District 24 | 0.8% |
| State house district | Share of ZIP residents |
|---|---|
| State House District 187 | 66% |
| State House District 132 | 34% |
| State House District 130 | 0.8% |
Voting precincts
8 voting precincts overlap ZIP 18031. 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:18031")
ZIP 18031 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.