Plain

City ZIP codes · Kentucky

Somerset, KY ZIP Codes

3 ZIP codes use the postal name Somerset, Kentucky (Census 2020 ZCTAs and GeoNames postal codes, October 2026): 2 residential and 1 for PO boxes or a single organization. Median household income runs from $48,965 in 42501 to $54,707 in 42503 (Census Bureau, ACS 2020-2024). Somerset's most populous ZIP code is 42503, with 25,321 people (ACS 2020-2024); 0% of its land is in the city of Somerset.

  • ACS2020-24
  • Census2020
  • GeoNames2026

Where are Somerset's ZIP codes?

42501: $49k median household income42503: $55k median household income425034250142501: $49k median household income42503: $55k median household income425034250142501: $49k median household income42503: $55k median household income4250342501
The 2 residential ZIP codes named Somerset, 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).

How different are Somerset's ZIP codes?

The highest median household income is in 42503 ($54,707), the lowest in 42501 ($48,965). Home values run from $142,200 in 42501 to $210,200 in 42503.

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013, B25077, B01003).

All 2 residential ZIP codes of Somerset

Residential ZIP codes with the postal name Somerset, KY, largest first (ACS 2020-2024); sort by any column
County
42503 Pulaski County 25,321 196 $55k $210k
42501 Pulaski County 18,214 91 $49k $142k

Download the 3 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).

PO Box and single-organization ZIP codes in Somerset

1 ZIP code named Somerset has no residential delivery area: post office boxes, or one organization (a large employer, an agency, a university) with its own code. The Census Bureau publishes no figures for them.

Somerset, KY: ZIP codes without a residential area, for PO boxes or one organization (GeoNames postal codes; USPS does not publish openly which is which)
ZIPCounty
42502Pulaski County

Source: GeoNames postal codes (CC BY 4.0); a ZIP code with no Census ZCTA has no residential delivery area.

Which counties do Somerset's ZIP codes reach?

Somerset's residential ZIP codes lie in Pulaski County.

Which first three digits do Somerset'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 Somerset starts with 425.

Three-digit prefixes of Somerset'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 Somerset's
PrefixSectional centerHereAll codes
425 Knoxville, TN (SCF 377) 3 17

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