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County ZIP codes · Kentucky · FIPS 21085

Grayson County, KY ZIP Codes

Grayson County, Kentucky has 10 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 9 residential and 1 for PO boxes or a single organization. 4 of the residential ones lie mainly in Grayson County and 5 mainly in a neighboring county; 7 cross the county line. Median household income ranges from $48,737 in 42754 (Leitchfield) to $60,078 in 42726 (Clarkson) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Grayson County?

40119 · Falls Of Rough: $66k42207 · Bee Spring: $46k42349 · Horse Branch: $59k42361 · Olaton: $44k42712 · Big Clifty: $46k42721 · Caneyville: $50k42726 · Clarkson: $60k42754 · Leitchfield: $49k42762 · Millwood: –42754427214272640119427124234942361422074276240119 · Falls Of Rough: $66k42207 · Bee Spring: $46k42349 · Horse Branch: $59k42361 · Olaton: $44k42712 · Big Clifty: $46k42721 · Caneyville: $50k42726 · Clarkson: $60k42754 · Leitchfield: $49k42762 · Millwood: –42754427214272640119427124234942361422074276240119 · Falls Of Rough: $66k42207 · Bee Spring: $46k42349 · Horse Branch: $59k42361 · Olaton: $44k42712 · Big Clifty: $46k42721 · Caneyville: $50k42726 · Clarkson: $60k42754 · Leitchfield: $49k42762 · Millwood: –4275442721427264011942712423494236142207
The residential ZIP codes of Grayson 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).

How different are its ZIP codes?

They carry 9 postal town names.

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

All 9 residential ZIP codes in Grayson County

4 ZIP codes lie mainly in Grayson County; 5 more reach into it from a neighboring county and follow the first table.

Residential ZIP codes mainly in Grayson County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
42754 Leitchfield 16,918 90 $49k $172k 90%
42726 Clarkson 4,758 46 $60k $204k 100%
42721 Caneyville 4,353 31 $50k $131k 90%
42762 Millwood 229 24 – $113k 100%

Partly in Grayson County

Residential ZIP codes mainly in another county that reach at least 1% into Grayson County, by their share here
In this county
42712 Big Clifty 1,714 32 $46k $147k 48%
40119 Falls Of Rough 1,976 18 $66k $129k 42%
42361 Olaton 425 11 $44k $89k 31%
42349 Horse Branch 1,962 35 $59k $89k 10%
42207 Bee Spring 927 48 $46k $153k 3%

Download the 10 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?

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

Share of each ZIP code's land in Grayson County and in the neighboring counties
ZIPIn GraysonElsewhere
4275490%Breckinridge County9%
4272190%Butler County6%; Edmonson County4%
4011942%Breckinridge County54%; Ohio County4%
4234910%Ohio County90%
4271248%Hardin County52%
422073%Edmonson County97%
4236131%Ohio County69%

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

PO Box and single-organization ZIP codes

ZIP codes in Grayson County without a residential area (GeoNames postal codes)
ZIPPostal name
42755Leitchfield

Source: GeoNames postal codes (CC BY 4.0).

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

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Grayson County's ZIP codes use 4 prefixes: 401, 422, 423 and 427.

Three-digit prefixes of Grayson 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 Grayson County's
PrefixSectional centerHereAll codes
401Louisville, KY (SCF 400)136
422Nashville, TN (SCF 370)136
423Evansville, IN (SCF 476)245
427Louisville, KY (SCF 400)638

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