ZIP code 17820 is in Catawissa (28% of residents), Numidia (5.0%) and Slabtown (2.7%), in Columbia County (97%) and Montour County (3.3%), Pennsylvania. 64% of its residents live outside city limits. It is in Pennsylvania's 9th congressional district. Its state senate district is State Senate District 27; its state house districts are State House District 109 (97%) and State House District 108 (3.3%).
Members serving now (119th Congress, until January 3, 2027). Source: Members of Congress: the @unitedstates project, congress-legislators (CC0).
State legislative districts
State senate district
Share of ZIP residents
State Senate District 27
100%
State house district
Share of ZIP residents
State House District 109
97%
State House District 108
3.3%
Voting precincts
9 voting precincts overlap ZIP 17820.
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:17820")
ZIP 17820 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.