ZIP Code 16121

16121 is one of Pennsylvania's ZIP codes, delivering to addresses in Farrell, Mercer County.

City: Farrell
County: Mercer County
State: Pennsylvania
Prefix: 161xx

Where this code sits

16121 is part of the 161xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Farrell.

Farrell Pennsylvania ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 16121 delivers to without sharing its boundary.

ZIP codes nearest 16121

The ZIP codes whose reference points sit closest to 16121.
ZIP code	Distance	Delivers to
ZIP code 16161	0.7 mi	Wheatland, PA
ZIP code 16146	1.4 mi	Sharon, PA
ZIP code 44438	2.2 mi	Masury, OH
ZIP code 16148	2.6 mi	Hermitage, PA
ZIP code 16159	3.3 mi	West Middlesex, PA
ZIP code 16150	4.2 mi	Sharpsville, PA
ZIP code 44403	5.1 mi	Brookfield, OH
ZIP code 44425	5.4 mi	Hubbard, OH

Straight-line distance between place reference points, not driving distance. Where a place has no Census Gazetteer point, its postal centroid is used instead.

Each point is the reference point for 16121, plotted from its record coordinates.

Reference points and footprint
Not an official NANPA boundary
Not a USPS delivery area

Scope ZIP code 16121. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated 15 July 2026. A ZIP code is a set of delivery routes, not an area; the point shown is a record coordinate, not a centre.