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County ZIP codes · Kentucky · FIPS 21057

Cumberland County, KY ZIP Codes

Cumberland County, Kentucky has 4 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 2 of the residential ones lie mainly in Cumberland County and 2 mainly in a neighboring county; 3 cross the county line.

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Cumberland County?

42167 · Tompkinsville: $49k42715 · Breeding: –42717 · Burkesville: $43k42759 · Marrowbone: –42717421674271542167 · Tompkinsville: $49k42715 · Breeding: –42717 · Burkesville: $43k42759 · Marrowbone: –42717421674271542167 · Tompkinsville: $49k42715 · Breeding: –42717 · Burkesville: $43k42759 · Marrowbone: –427174216742715
The residential ZIP codes of Cumberland County (whole outlines, including the parts in neighboring counties), shaded by median household income in national fifths (ACS 2020-2024).<$54.1k$98.1k+no figure

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

All 4 residential ZIP codes in Cumberland County

2 ZIP codes lie mainly in Cumberland County; 2 more reach into it from a neighboring county and follow the first table.

Residential ZIP codes mainly in Cumberland County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
42717 Burkesville 5,969 20 $43k $145k 98%
42759 Marrowbone 15 103 – – 100%

Partly in Cumberland County

Residential ZIP codes mainly in another county that reach at least 1% into Cumberland County, by their share here
In this county
42715 Breeding 417 17 – $227k 16%
42167 Tompkinsville 8,172 40 $49k $114k 1%

Download the 4 ZIP codes as CSV

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; county shares by land area (Census 2020 ZCTA-county relationship file).

Which ZIP codes cross the county line?

3 ZIP codes of Cumberland County extend into another county. A ZIP code follows mail routes, not county borders.

Share of each ZIP code's land in Cumberland County and in the neighboring counties
ZIPIn CumberlandElsewhere
421671%Monroe County98%
4271798%Clinton County2%
4271516%Adair County62%; Metcalfe County22%

Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).

Which first three digits do Cumberland County's ZIP codes use?

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Cumberland County's ZIP codes use 2 prefixes: 421 and 427.

Three-digit prefixes of Cumberland County'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 Cumberland County's
PrefixSectional centerHereAll codes
421Nashville, TN (SCF 370)133
427Louisville, KY (SCF 400)338

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