ZIP Codes of Decatur County, KS

Population & People
Population & People
Total Population
2,771
Household Income
Household Income
Median Income
$53,640
Housing
Housing
Total Housing Units
1,614
Business & Economy
Business & Economy
Total Businesses
94
Employment
Employment
Employment Rate
57.71%
Education
Education
Bachelor's Degree+
26.83%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 4 ZIPs in this county.
Data Last Updated: June 1, 2026
ZIP Codes:4 ZIP Codes (4 Standard, 0 PO Box, 0 Unique) [See All]
Area Code:785
Timezone:Central (GMT -06:00)
Local Time:2:12:11 PM
Population:2,771 [See All]
FIPS:20039
Land Area:917 sq mi
Water Area:1 sq mi
Coordinates:39.7343, -100.3526
Quick Link:
https://www.zip-codes.com/county/ks-decatur.asp
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Kansas's #85 most populous county
2,771 residents across 4 ZIPs — #85 of 106 Kansas counties.

Standout ZIPs in this County


Most Populous
Oberlin · 2,209 people
79.7% of county total
Highest Income
Oberlin · $54,000 median
1.0× county average
Largest Land Area
Oberlin · 461.1 sq mi
Spans the most ground
Fastest Growth
Oberlin · -3.5% (10-yr)
2,290 → 2,209 residents
Most Educated
Oberlin · 28.7% bachelor's+
496 of 1,729 adults 25+

Things worth knowing about Decatur County


2,771 residents live across 4 ZIPs covering 917 sq mi, served by 4 distinct USPS-recognized cities.

Population moved from 2,907 to 2,771 from 2014 to 2024 — a -4.7% change. 0 ZIPs gained residents, 4 lost.

The county's wealthiest ZIP 67749 (Oberlin, $54,000 median) and poorest ZIP 67653 (Norcatur, $53,281) are 17.5 miles apart — a 1.0× income gap across local geography.

Median home values vary 3.0× across this county — from $47,000 in 67643 (Jennings) to $141,300 in 67635 (Dresden).

Density varies across the county — from 1 people/sq mi in 67643 (Jennings) to 5 in 67749 (Oberlin).

Educational attainment ranges from 5.4% bachelor's+ in 67635 (Dresden) to 32.9% in 67643 (Jennings) — the breadth of educational profiles across the area.

Within Kansas, this is the #85 most populous of 106 counties and ranks #106 for median household income .

Weighted by population, the typical household earns about $53,932 across the county — reflecting what a typical resident sees, not a simple ZIP average.

26.8% of adults age 25+ hold a bachelor's degree or higher (575 of 2,143 reporting).

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

Stories about Decatur County


Big & sparse

A frontier county — vast land area with only a few residents per square mile. Daily life looks very different here than in the country's denser counties.

Total area
917
square miles
Avg density
3.0
people per sq mi
Population
2,771
across 4 ZIPs
Oberlin
461.1 sq mi
2,209 residents
Norcatur
189.3 sq mi
232 residents
Jennings
166.8 sq mi
194 residents

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.

Oberlin

All ZIP Codes in Decatur County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
67749OberlinStandard2,209$54,000461.1-3.5%
67653NorcaturStandard232$53,281189.3-5.3%
67643JenningsStandard194166.8-13.0%
67635DresdenStandard136100.2-8.7%

Adjacent & Nearby Counties