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zipcodes.pro — STATE/KS/COUNTY/ALLEN

Allen County, KS ZIP codes

There are 7 ZIP codes in Allen County, KS, in 7 towns, from 66732 to 66772. The largest are 66749 (Iola), 66748 (Humboldt) and 66755 (Moran).

The county seat is Iola.

ZIP codes
7
Towns
7
County seat
Iola
County FIPS
20001
State
Kansas
Population
12,483
Median household income
$60,689
Land area
500 sq mi

Allen County ZIP codes by town

Iola (county seat)
66749

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 Allen County ZIP codes

66732667426674866749667516675566772

The ZIP codes of Allen 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.

Allen County in numbers

About 12,483 people live in Allen County, in 5,011 households, the 36th most populous of Kansas's 105 counties. The median household income is $60,689 a year, 18% below the Kansas median of $74,275 (US: $80,734). The median owner-occupied home is valued at $107,600 (50% below the Kansas median), and median gross rent is $720 a month. The median age is 41.2; 22.4% of adults 25 and over hold a bachelor's degree or higher (35.6% across Kansas); the average commute takes 18 minutes.

Population12,483Allen12,483
Households5,011Allen5,011
Median age41.2Allen41.2Kansas37.4US 38.9
Median household income$60,689Allen$60,689Kansas$74,275US $80,734
Median home value$107,600Allen$107,600Kansas$217,200US $332,700
Median gross rent$720Allen$720Kansas$1,060US $1,413
Bachelor's degree or higher22.4%Allen22.4%Kansas35.6%US 35.7%
Mean commute18.4 minAllen18.4 minKansas19.7 minUS 26.4 min
Population density25 / sq miAllen25 / 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 Allen County

Largest towns in Allen County
TownZIP codesPopulation
Iola 1 5,348
Humboldt 1 1,793
Gas 1 512
La Harpe 1 492
Moran 1 472
Savonburg 1 93
Elsmore 1 56

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 Allen County.

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

Every ZIP code in Allen County, with figures

ZIP codes in Allen County
ZIP City Type Population Median income Median home
66732 Elsmore , KS Standard 294 $87,625 $85,600
66742 Gas , KS Standard 30 — —
66748 Humboldt , KS Standard 2,830 $59,871 $114,300
66749 Iola , KS Standard 7,448 $60,093 $107,000
66751 La Harpe , KS Standard 590 $48,417 $57,700
66755 Moran , KS Standard 890 $74,417 $153,800
66772 Savonburg , KS Standard 288 $60,703 $206,600

Cite this page

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

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