ZIP code 16105: New Castle, PA

ZIP code 16105 is in New Castle (30% of residents) and New Castle Northwest (9.1%), in Lawrence County, Pennsylvania. 61% of its residents live outside city limits. It is in Pennsylvania's 16th congressional district. Its state senate district is State Senate District 50; its state house district is State House District 9.

15,420residents (2020 Census)

25.6 sq miland area

2cities and towns

1congressional district

18voting precincts

See it on the map All of Pennsylvania

City and county

City or town	Share of ZIP residents
New Castle	30%
New Castle Northwest	9.1%

County	Share of ZIP residents
Lawrence County	100%

Town or county subdivision	Share of ZIP residents
Neshannock township	64%
New Castle city	30%
Hickory township	3.8%
Wilmington township	1.8%
Pulaski township	0.4%

Congressional district

Congressional district	Share of ZIP residents
Pennsylvania's 16th congressional district (PA-16)	100%

Elected officials

Office	Member	Contact	Share of residents
U.S. Representative (PA-16)	Mike Kelly (R)	202-225-5406	100%
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 50)	Michele Brooks (R)	724-654-1444	100%
State Representative (State House District 9)	Marla Brown (R)	724-498-4397	100%

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

New Castle website: https://www.newcastlepa.org/
New Castle laws: search for the New Castle, Pennsylvania code of ordinances
New Castle Northwest laws: search for the New Castle Northwest, Pennsylvania code of ordinances
Lawrence County website: http://www.co.lawrence.pa.us
Lawrence County laws: search for the Lawrence County, Pennsylvania code of ordinances

State legislative districts

State senate district	Share of ZIP residents
State Senate District 50	100%

State house district	Share of ZIP residents
State House District 9	100%

Voting precincts

18 voting precincts overlap ZIP 16105. 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:

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ZIP 16105 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.