ZIP Codes of Linn County, KS

Population & People
Population & People
Total Population
9,742
Household Income
Household Income
Median Income
$61,562
Housing
Housing
Total Housing Units
5,176
Business & Economy
Business & Economy
Total Businesses
198
Employment
Employment
Employment Rate
54.77%
Education
Education
Bachelor's Degree+
21.61%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 6 ZIPs in this county.
Data Last Updated: July 1, 2026
ZIP Codes:6 ZIP Codes (6 Standard, 0 PO Box, 0 Unique) [See All]
Area Codes:620 / 913
Timezone:Central (GMT -06:00)
Local Time:11:53:31 PM
Population:9,742 [See All]
FIPS:20107
CBSA:Kansas City, MO-KS
Land Area:547 sq mi
Water Area:12 sq mi
Coordinates:38.2016, -94.8161
Quick Link:
https://www.zip-codes.com/county/ks-linn.asp
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Kansas's longest commutes
36-minute average travel time to work.

Standout ZIPs in this County


Most Populous
La Cygne · 3,651 people
37.5% of county total
Highest Income
Parker · $101,875 median
1.7× county average
Largest Land Area
La Cygne · 146.0 sq mi
Spans the most ground
Fastest Growth
Pleasanton · 27.3% (10-yr)
1,961 → 2,497 residents
Most Educated
Mound City · 23.4% bachelor's+
238 of 1,017 adults 25+

Things worth knowing about Linn County


9,742 residents live across 6 ZIPs covering 547 sq mi, served by 6 distinct USPS-recognized cities.

Population moved from 9,180 to 9,742 from 2014 to 2024 — a +6.1% change. 3 ZIPs gained residents, 3 lost.

The county's wealthiest ZIP 66072 (Parker, $101,875 median) and poorest ZIP 66010 (Blue Mound, $44,318) are 15.6 miles apart — a 2.3× income gap across local geography.

Median home values vary 2.8× across this county — from $104,800 in 66767 (Prescott) to $296,800 in 66072 (Parker).

Density varies across the county — from 7 people/sq mi in 66010 (Blue Mound) to 25 in 66040 (La Cygne).

Educational attainment ranges from 16.0% bachelor's+ in 66010 (Blue Mound) to 29.4% in 66072 (Parker) — the breadth of educational profiles across the area.

Within Kansas, this is the #40 most populous of 106 counties and ranks #81 for median household income with the #7 fastest decade growth .

Weighted by population, the typical household earns about $62,613 across the county — reflecting what a typical resident sees, not a simple ZIP average.

21.6% of adults age 25+ hold a bachelor's degree or higher (1,499 of 6,937 reporting).

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

Stories about Linn 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
547
square miles
Avg density
17.8
people per sq mi
Population
9,742
across 6 ZIPs
La Cygne
146.0 sq mi
3,651 residents
Pleasanton
110.7 sq mi
2,497 residents
Mound City
91.6 sq mi
1,383 residents

All ZIP Codes in Linn County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
66040La CygneStandard3,651$56,323146.06.0%
66075PleasantonStandard2,497$62,407110.727.3%
66056Mound CityStandard1,383$57,81391.6-14.4%
66072ParkerStandard1,211$101,87569.517.9%
66010Blue MoundStandard626$44,31887.3-12.2%
66767PrescottStandard374$46,63541.5-10.7%

Adjacent & Nearby Counties