ZIP Codes of Lyon County, KY

Population & People
Population & People
Total Population
8,483
Household Income
Household Income
Median Income
$64,256
Housing
Housing
Total Housing Units
4,636
Business & Economy
Business & Economy
Total Businesses
166
Employment
Employment
Employment Rate
41.19%
Education
Education
Bachelor's Degree+
16.54%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 2 ZIPs in this county.
Data Last Updated: July 1, 2026
ZIP Codes:2 ZIP Codes (2 Standard, 0 PO Box, 0 Unique) [See All]
Area Codes:270 / 364
Timezone:Central (GMT -06:00)
Local Time:11:53:38 PM
Population:8,483 [See All]
FIPS:21143
Land Area:205 sq mi
Water Area:17 sq mi
Coordinates:37.0379, -88.0957
Quick Link:
https://www.zip-codes.com/county/ky-lyon.asp
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Among Kentucky's 5 oldest counties
Median age 47.9.

Standout ZIPs in this County


Most Populous
Eddyville · 6,282 people
74.1% of county total
Highest Income
Eddyville · $65,056 median
1.0× county average
Largest Land Area
Eddyville · 139.0 sq mi
Spans the most ground
Fastest Growth
Eddyville · 13.1% (10-yr)
5,555 → 6,282 residents
Most Educated
Kuttawa · 18.3% bachelor's+
316 of 1,729 adults 25+

Things worth knowing about Lyon County


8,483 residents live across 2 ZIPs covering 205 sq mi, served by 2 distinct USPS-recognized cities.

Population moved from 7,987 to 8,483 from 2014 to 2024 — a +6.2% change. 1 ZIPs gained residents, 1 lost.

The county's wealthiest ZIP 42038 (Eddyville, $65,056 median) and poorest ZIP 42055 (Kuttawa, $63,456) are 8.3 miles apart — a 1.0× income gap across local geography.

Median home values vary 1.1× across this county — from $179,400 in 42055 (Kuttawa) to $198,400 in 42038 (Eddyville).

Density varies across the county — from 33 people/sq mi in 42055 (Kuttawa) to 45 in 42038 (Eddyville).

Educational attainment ranges from 15.9% bachelor's+ in 42038 (Eddyville) to 18.3% in 42055 (Kuttawa) — the breadth of educational profiles across the area.

Within Kentucky, this is the #103 most populous of 120 counties and ranks #36 for median household income with the #28 fastest decade growth .

Weighted by population, the typical household earns about $64,641 across the county — reflecting what a typical resident sees, not a simple ZIP average.

16.5% of adults age 25+ hold a bachelor's degree or higher (1,115 of 6,740 reporting).

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

Stories about Lyon County


Single-ZIP anchor

One ZIP holds the majority of this county's population — a sign of a county built around a single city or town.

Eddyville

All ZIP Codes in Lyon County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
42038EddyvilleStandard6,282$65,056139.013.1%
42055KuttawaStandard2,201$63,45666.1-9.5%

Adjacent & Nearby Counties