City ZIP codes · Pennsylvania

New Wilmington, PA ZIP Codes

2 ZIP codes use the postal name New Wilmington, Pennsylvania (Census 2020 ZCTAs and GeoNames postal codes, October 2026), all residential. New Wilmington's most populous ZIP code is 16142, with 5,522 people (ACS 2020-2024); 2% of its land is in the city of New Wilmington.

ACS2020-24
Census2020
GeoNames2026

Where are New Wilmington's ZIP codes?

The 2 residential ZIP codes named New Wilmington, shaded by median household income in national fifths (ACS 2020-2024). Select a ZIP to open it. <$54.1k$98.1k+no figure

Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).

All 2 residential ZIP codes of New Wilmington

Residential ZIP codes with the postal name New Wilmington, PA, largest first (ACS 2020-2024); sort by any column
	County
16142	Mercer County	5,522	126	$84k	$226k
16172	Lawrence County	983	11,843	–	–

Download the 2 ZIP codes as CSV

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; 2023 Gazetteer land areas (2020 ZCTAs); town names from simplemaps US ZIP Codes (CC BY 4.0) and GeoNames (CC BY 4.0).

Which counties do New Wilmington's ZIP codes reach?

New Wilmington's residential ZIP codes lie in 2 counties: Mercer County (1 ZIP code mainly there), Lawrence County (1 ZIP code mainly there).

Which first three digits do New Wilmington's ZIP codes use?

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Every ZIP code of New Wilmington starts with 161.

Three-digit prefixes of New Wilmington's ZIP codes, the sectional center for each (USPS labeling list L005, effective October 1, 2026) and how many of the prefix's codes are New Wilmington's
Prefix	Sectional center	Here	All codes
161	Pittsburgh, PA (SCF 150)	2	45

Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.