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

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zipcodes.pro — STATE/KS/COUNTY/JEFFERSON

Jefferson County, KS ZIP codes

There are 9 ZIP codes in Jefferson County, KS, in 9 towns, from 66054 to 66512. The largest are 66512 (Meriden), 66054 (Mc Louth) and 66066 (Oskaloosa).

The county seat is Oskaloosa.

ZIP codes
9
Towns
9
County seat
Oskaloosa
County FIPS
20087
State
Kansas
Population
18,349
Median household income
$81,278
Land area
533 sq mi
Area code
913
Metro area
Topeka

Jefferson County ZIP codes by town

Oskaloosa (county seat)
66066

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.

Map of Jefferson County ZIP codes

660546606066066660706607366088660976642966512

The ZIP codes of Jefferson 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.

Jefferson County in numbers

About 18,349 people live in Jefferson County, in 7,412 households, the 30th most populous of Kansas's 105 counties. The median household income is $81,278 a year, 9% above the Kansas median of $74,275 (US: $80,734). The median owner-occupied home is valued at $216,900 (about the same as the Kansas median), and median gross rent is $835 a month. The median age is 44.2; 24.6% of adults 25 and over hold a bachelor's degree or higher (35.6% across Kansas); the average commute takes 30 minutes.

Population18,349Jefferson18,349
Households7,412Jefferson7,412
Median age44.2Jefferson44.2Kansas37.4US 38.9
Median household income$81,278Jefferson$81,278Kansas$74,275US $80,734
Median home value$216,900Jefferson$216,900Kansas$217,200US $332,700
Median gross rent$835Jefferson$835Kansas$1,060US $1,413
Bachelor's degree or higher24.6%Jefferson24.6%Kansas35.6%US 35.7%
Mean commute30.1 minJefferson30.1 minKansas19.7 minUS 26.4 min
Population density34 / sq miJefferson34 / 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 Jefferson County

Largest towns in Jefferson County
TownZIP codesPopulation
Mc Louth 1 2,777
Valley Falls 1 1,382
Oskaloosa 1 1,113
Perry 1 1,069
Meriden 1 716
Nortonville 1 715
Ozawkie 1 604
Winchester 1 417
Grantville 1 122

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 Jefferson County.

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

Every ZIP code in Jefferson County, with figures

ZIP codes in Jefferson County
ZIP City Type Population Median income Median home
66054 Mc Louth , KS Standard 2,777 $98,214 $243,500
66060 Nortonville , KS Standard 1,325 $77,222 $155,800
66066 Oskaloosa , KS Standard 2,432 $79,990 $225,700
66070 Ozawkie , KS Standard 1,944 $85,714 $219,500
66073 Perry , KS Standard 2,263 $86,641 $216,600
66088 Valley Falls , KS Standard 2,697 $75,795 $196,000
66097 Winchester , KS Standard 995 $66,369 $254,300
66429 Grantville , KS Standard 379 $68,780 $175,000
66512 Meriden , KS Standard 3,678 $79,008 $214,100

Cite this page

zipcodes.pro. “Jefferson County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/ks/county/jefferson

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