Boundary Atlas

ZIP code 17566: Quarryville, PA

ZIP code 17566 is in Quarryville (22% of residents) and Georgetown (1.9%), in Lancaster County, Pennsylvania. 76% of its residents live outside city limits. It is in Pennsylvania's 11th congressional district. Its state senate district is State Senate District 13; its state house district is State House District 100.

12,724residents (2020 Census)
59.6 sq miland area
3cities and towns
1congressional district
10voting precincts

See it on the mapAll of Pennsylvania

City and county

City or townShare of ZIP residents
Quarryville22%
Georgetown1.9%
Little Britain0.8%

CountyShare of ZIP residents
Lancaster County100%

Town or county subdivisionShare of ZIP residents
East Drumore township30%
Quarryville borough22%
Eden township17%
Bart township11%
Little Britain township7.2%
Colerain township4.9%
Providence township4.7%
Drumore township3.0%
Fulton township0.5%

Congressional district

Congressional districtShare of ZIP residents
Pennsylvania's 11th congressional district (PA-11)100%

State legislative districts

State senate districtShare of ZIP residents
State Senate District 13100%

State house districtShare of ZIP residents
State House District 100100%

Voting precincts

10 voting precincts overlap ZIP 17566. Map them, with each precinct's share of the ZIP's residents.

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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:17566")

ZIP 17566 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.