ZIP Codes of Grayson County, KY

Population & People
Population & People
Total Population
29,948
Household Income
Household Income
Median Income
$53,954
Housing
Housing
Total Housing Units
15,307
Business & Economy
Business & Economy
Total Businesses
449
Employment
Employment
Employment Rate
51.36%
Education
Education
Bachelor's Degree+
16.34%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 7 ZIPs in this county.
Data Last Updated: June 1, 2026
ZIP Codes:7 ZIP Codes (6 Standard, 1 PO Box, 0 Unique) [See All]
Area Codes:270 / 364
Timezone:Central (GMT -06:00)
Local Time:2:12:18 PM
Population:29,948 [See All]
FIPS:21085
Land Area:619 sq mi
Water Area:13 sq mi
Coordinates:37.4880, -86.3355
Quick Link:
https://www.zip-codes.com/county/ky-grayson.asp
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Kentucky's #36 most populous county
29,948 residents across 7 ZIPs — #36 of 120 Kentucky counties.

Standout ZIPs in this County


Most Populous
Leitchfield · 16,918 people
56.5% of county total
Highest Income
Falls Of Rough · $65,500 median
1.2× county average
Largest Land Area
Leitchfield · 193.7 sq mi
Spans the most ground
Fastest Growth
Falls Of Rough · 25.1% (10-yr)
1,580 → 1,976 residents
Most Educated
Falls Of Rough · 26.6% bachelor's+
405 of 1,520 adults 25+

Things worth knowing about Grayson County


29,948 residents live across 7 ZIPs covering 619 sq mi, served by 6 distinct USPS-recognized cities.

Population moved from 28,135 to 29,948 from 2014 to 2024 — a +6.4% change. 4 ZIPs gained residents, 2 lost.

The county's wealthiest ZIP 40119 (Falls Of Rough, $65,500 median) and poorest ZIP 42712 (Big Clifty, $45,870) are 25.8 miles apart — a 1.4× income gap across local geography.

Median home values vary 1.8× across this county — from $113,000 in 42762 (Millwood) to $204,200 in 42726 (Clarkson).

Density varies across the county — from 18 people/sq mi in 40119 (Falls Of Rough) to 87 in 42754 (Leitchfield).

Educational attainment ranges from 14.5% bachelor's+ in 42726 (Clarkson) to 26.6% in 40119 (Falls Of Rough) — the breadth of educational profiles across the area.

Within Kentucky, this is the #36 most populous of 120 counties and ranks #73 for median household income with the #26 fastest decade growth .

Weighted by population, the typical household earns about $51,626 across the county — reflecting what a typical resident sees, not a simple ZIP average.

16.3% of adults age 25+ hold a bachelor's degree or higher (3,376 of 20,662 reporting).

6 Standard delivery, 1 PO Box only, 0 single-entity Unique ZIPs serve this county.

Stories about Grayson County


Big & sparse

A frontier county — vast land area with only a few residents per square mile. Daily life looks very different here than in the country's denser counties.

Total area
619
square miles
Avg density
48.4
people per sq mi
Population
29,948
across 7 ZIPs
Leitchfield
193.7 sq mi
16,918 residents
Caneyville
143.2 sq mi
4,353 residents
Clarkson
111.2 sq mi
4,758 residents

All ZIP Codes in Grayson County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
42754LeitchfieldStandard16,918$48,737193.710.3%
42726ClarksonStandard4,758$60,078111.2-9.3%
42721CaneyvilleStandard4,353$49,583143.26.0%
40119Falls Of RoughStandard1,976$65,500110.325.1%
42712Big CliftyStandard1,714$45,87050.921.8%
42762MillwoodStandard2299.5-50.8%
42755LeitchfieldPO Box0.0

Adjacent & Nearby Counties