ZIP Codes of Clark County, KY

Population & People
Population & People
Total Population
36,796
Household Income
Household Income
Median Income
$64,144
Housing
Housing
Total Housing Units
16,243
Business & Economy
Business & Economy
Total Businesses
782
Employment
Employment
Employment Rate
56.00%
Education
Education
Bachelor's Degree+
22.69%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 2 ZIPs in this county.
Data Last Updated: June 1, 2026
ZIP Codes:2 ZIP Codes (1 Standard, 1 PO Box, 0 Unique) [See All]
Area Code:859
Timezone:Eastern (GMT -05:00)
Local Time:2:12:17 PM
Population:36,796 [See All]
FIPS:21049
CBSA:Lexington-Fayette, KY
Land Area:239 sq mi
Water Area:2 sq mi
Coordinates:37.9826, -84.1661
Quick Link:
https://www.zip-codes.com/county/ky-clark.asp
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Kentucky's #29 most populous county
36,796 residents across 2 ZIPs — #29 of 120 Kentucky counties.

Standout ZIPs in this County


Most Populous
Winchester · 36,796 people
100.0% of county total
Highest Income
Winchester · $64,144 median
1.0× county average
Largest Land Area
Winchester · 239.5 sq mi
Spans the most ground
Fastest Growth
Winchester · 4.1% (10-yr)
35,351 → 36,796 residents
Most Educated
Winchester · 22.7% bachelor's+
5,855 of 25,806 adults 25+

Things worth knowing about Clark County


36,796 residents live across 2 ZIPs covering 239 sq mi, served by 1 distinct USPS-recognized cities.

Population moved from 35,351 to 36,796 from 2014 to 2024 — a +4.1% change. 1 ZIPs gained residents, 0 lost.

The county's wealthiest ZIP 40391 (Winchester, $64,144 median) and poorest ZIP 40391 (Winchester, $64,144) are 0.0 miles apart — a 1.0× income gap across local geography.

Within Kentucky, this is the #29 most populous of 120 counties and ranks #37 for median household income .

Weighted by population, the typical household earns about $64,144 across the county — reflecting what a typical resident sees, not a simple ZIP average.

22.7% of adults age 25+ hold a bachelor's degree or higher (5,855 of 25,806 reporting).

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

All ZIP Codes in Clark County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
40391WinchesterStandard36,796$64,144239.54.1%
40392WinchesterPO Box0.0

Adjacent & Nearby Counties