Boundary Atlas

ZIP code 16635: Allegheny, PA

ZIP code 16635 is in Penn Farms (20% of residents), Duncansville (11%), Foot of Ten (4.8%), Cross Keys (3.7%), Sunbrook (2.8%) and Carson Valley (1.1%), in Blair County, Pennsylvania. 57% of its residents live outside city limits. It is in Pennsylvania's 13th congressional district. Its state senate district is State Senate District 30; its state house districts are State House District 80 (55%) and State House District 79 (45%).

11,661residents (2020 Census)
56.8 sq miland area
10cities and towns
1congressional district
11voting precincts

See it on the mapAll of Pennsylvania

City and county

City or townShare of ZIP residents
Penn Farms20%
Duncansville11%
Foot of Ten4.8%
Cross Keys3.7%
Sunbrook2.8%
Carson Valley1.1%
Leamersville0.8%
Puzzletown0.8%
Brooks Mill0.6%
Blue Knob0.1%

CountyShare of ZIP residents
Blair County100%

Town or county subdivisionShare of ZIP residents
Allegheny township45%
Blair township28%
Duncansville borough11%
Freedom township9.8%
Juniata township6.7%

Congressional district

Congressional districtShare of ZIP residents
Pennsylvania's 13th congressional district (PA-13)100%

State legislative districts

State senate districtShare of ZIP residents
State Senate District 30100%

State house districtShare of ZIP residents
State House District 8055%
State House District 7945%

Voting precincts

11 voting precincts overlap ZIP 16635. 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:16635")

ZIP 16635 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.