ZIP code 18331: Polk, PA
ZIP code 18331 is in Monroe County, Pennsylvania, outside any city or Census-designated place. It is in Pennsylvania's 7th congressional district (56%) and Pennsylvania's 8th congressional district (44%). Its state senate district is State Senate District 40; its state house district is State House District 176.
See it on the mapAll of Pennsylvania
City and county
Outside any city or Census-designated place.
| County | Share of ZIP residents |
|---|---|
| Monroe County | 100% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Polk township | 56% |
| Chestnuthill township | 44% |
Congressional districts
| Congressional district | Share of ZIP residents |
|---|---|
| Pennsylvania's 7th congressional district (PA-07) | 56% |
| Pennsylvania's 8th congressional district (PA-08) | 44% |
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.
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 40 | 100% |
| State house district | Share of ZIP residents |
|---|---|
| State House District 176 | 100% |
Voting precincts
3 voting precincts overlap ZIP 18331. 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:18331")
ZIP 18331 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.