Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — STATE/KY/COUNTY/LYON

Lyon County, KY ZIP codes

Lyon County, KY has 2 ZIP codes, in 2 towns: 42038 and 42055. 1 more crosses into it from a neighbouring county: 42445.

The county seat is Eddyville.

ZIP codes
2
Partly in it
1 more
Towns
2
County seat
Eddyville
County FIPS
21143
Population
8,900
Median household income
$65,066
Land area
214 sq mi

Lyon County ZIP codes by town

Eddyville (county seat)
42038

Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.

ZIP codes partly in Lyon County

This ZIP code lies mostly in a neighbouring county but covers a twentieth or more of Lyon County.

Map of Lyon County ZIP codes

4203842055

The ZIP codes of Lyon County, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Lyon County in numbers

About 8,900 people live in Lyon County, in 3,419 households, the 105th most populous of Kentucky's 120 counties. The median household income is $65,066 a year, about the same as the Kentucky median of $63,726 (US: $80,734). The median owner-occupied home is valued at $189,500 (8% below the Kentucky median), and median gross rent is $747 a month. The median age is 47.1; 16.5% of adults 25 and over hold a bachelor's degree or higher (27.6% across Kentucky); the average commute takes 28 minutes.

Population8,900Lyon8,900
Households3,419Lyon3,419
Median age47.1Lyon47.1Kentucky39.1US 38.9
Median household income$65,066Lyon$65,066Kentucky$63,726US $80,734
Median home value$189,500Lyon$189,500Kentucky$205,600US $332,700
Median gross rent$747Lyon$747Kentucky$967US $1,413
Bachelor's degree or higher16.5%Lyon16.5%Kentucky27.6%US 35.7%
Mean commute28.3 minLyon28.3 minKentucky24.0 minUS 26.4 min
Population density42 / sq miLyon42 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.

Largest towns in Lyon County

Largest towns in Lyon County
TownZIP codesPopulation
Eddyville 1 2,897
Kuttawa 1 588

Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.

Neighbouring counties

Counties that share a ZIP code with Lyon County.

Not sure you are in Lyon County? What county am I in? answers from your location, near a county line included.

Every ZIP code in Lyon County, with figures

ZIP codes in Lyon County
ZIP City Type Population Median income Median home
42038 Eddyville , KY Standard 6,282 $65,056 $198,400
42055 Kuttawa , KY Standard 2,201 $63,456 $179,400

Cite this page

zipcodes.pro. “Lyon County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/ky/county/lyon

Underlying data is public domain or openly licensed — sources, vintages and licences.