ZIP Codes of Geary County, KS

Population & People
Population & People
Total Population
44,068
Household Income
Household Income
Median Income
$68,340
Housing
Housing
Total Housing Units
17,662
Business & Economy
Business & Economy
Total Businesses
582
Employment
Employment
Employment Rate
39.79%
Education
Education
Bachelor's Degree+
25.27%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 3 ZIPs in this county.
Data Last Updated: June 1, 2026
ZIP Codes:3 ZIP Codes (3 Standard, 0 PO Box, 0 Unique) [See All]
Area Code:785
Timezone:Central (GMT -06:00)
Local Time:2:12:12 PM
Population:44,068 [See All]
FIPS:20061
CBSA:Manhattan, KS
Land Area:355 sq mi
Water Area:4 sq mi
Coordinates:39.0825, -96.8070
Quick Link:
https://www.zip-codes.com/county/ks-geary.asp
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Among America's 25 youngest counties
Median age 26.9 — #20 youngest nationwide.
Among America's 50 most Hispanic-majority counties
0.7% Hispanic or Latino — #12 nationwide.
Kansas's most renter-heavy county
61.0% of homes are renter-occupied.

Standout ZIPs in this County


Most Populous
Junction City · 25,828 people
58.6% of county total
Highest Income
Milford · $93,889 median
1.4× county average
Largest Land Area
Junction City · 252.3 sq mi
Spans the most ground
Fastest Growth
Fort Riley · 9.6% (10-yr)
15,413 → 16,890 residents
Most Educated
Junction City · 25.9% bachelor's+
3,923 of 15,126 adults 25+

Things worth knowing about Geary County


44,068 residents live across 3 ZIPs covering 355 sq mi, served by 3 distinct USPS-recognized cities.

Population moved from 44,914 to 44,068 from 2014 to 2024 — a -1.9% change. 1 ZIPs gained residents, 2 lost.

The county's wealthiest ZIP 66514 (Milford, $93,889 median) and poorest ZIP 66442 (Fort Riley, $51,610) are 6.1 miles apart — a 1.8× income gap across local geography.

Median home values vary 1.3× across this county — from $169,800 in 66441 (Junction City) to $227,400 in 66514 (Milford).

Density varies 24× across the county — from 20 people/sq mi in 66514 (Milford) to 480 in 66442 (Fort Riley).

Educational attainment ranges from 13.9% bachelor's+ in 66514 (Milford) to 25.9% in 66441 (Junction City) — the breadth of educational profiles across the area.

Within Kansas, this is the #11 most populous of 106 counties and ranks #45 for median household income .

Weighted by population, the typical household earns about $57,542 across the county — reflecting what a typical resident sees, not a simple ZIP average.

25.3% of adults age 25+ hold a bachelor's degree or higher (5,546 of 21,947 reporting).

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

All ZIP Codes in Geary County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
66441Junction CityStandard25,828$59,522252.3-8.2%
66442Fort RileyStandard16,890$51,61035.29.6%
66514MilfordStandard1,350$93,88968.0-1.7%

Adjacent & Nearby Counties