ZIP Codes of Brown County, KS

Population & People
Population & People
Total Population
9,328
Household Income
Household Income
Median Income
$68,087
Housing
Housing
Total Housing Units
4,476
Business & Economy
Business & Economy
Total Businesses
262
Employment
Employment
Employment Rate
59.95%
Education
Education
Bachelor's Degree+
19.83%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 7 ZIPs in this county.
Data Last Updated: June 1, 2026
ZIP Codes:7 ZIP Codes (7 Standard, 0 PO Box, 0 Unique) [See All]
Area Code:785
Timezone:Central (GMT -06:00)
Local Time:2:12:10 PM
Population:9,328 [See All]
FIPS:20013
Land Area:568 sq mi
Water Area:1 sq mi
Coordinates:39.7862, -95.5641
Quick Link:
https://www.zip-codes.com/county/ks-brown.asp
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Kansas's #42 most populous county
9,328 residents across 7 ZIPs — #42 of 106 Kansas counties.

Standout ZIPs in this County


Most Populous
Hiawatha · 4,740 people
50.8% of county total
Highest Income
Morrill · $89,375 median
1.3× county average
Largest Land Area
Hiawatha · 219.7 sq mi
Spans the most ground
Fastest Growth
Hiawatha · -1.8% (10-yr)
4,828 → 4,740 residents
Most Educated
Hiawatha · 20.2% bachelor's+
660 of 3,268 adults 25+

Things worth knowing about Brown County


9,328 residents live across 7 ZIPs covering 568 sq mi, served by 7 distinct USPS-recognized cities.

Population moved from 10,013 to 9,328 from 2014 to 2024 — a -6.8% change. 1 ZIPs gained residents, 6 lost.

The county's wealthiest ZIP 66515 (Morrill, $89,375 median) and poorest ZIP 66439 (Horton, $53,348) are 22.5 miles apart — a 1.7× income gap across local geography.

Median home values vary 2.1× across this county — from $69,200 in 66527 (Powhattan) to $143,400 in 66434 (Hiawatha).

Density varies across the county — from 7 people/sq mi in 66532 (Robinson) to 29 in 66439 (Horton).

Educational attainment ranges from 12.3% bachelor's+ in 66425 (Fairview) to 34.5% in 66515 (Morrill) — the breadth of educational profiles across the area.

Within Kansas, this is the #42 most populous of 106 counties and ranks #48 for median household income .

Weighted by population, the typical household earns about $68,687 across the county — reflecting what a typical resident sees, not a simple ZIP average.

19.8% of adults age 25+ hold a bachelor's degree or higher (1,280 of 6,456 reporting).

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

Stories about Brown 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
568
square miles
Avg density
16.4
people per sq mi
Population
9,328
across 7 ZIPs
Hiawatha
219.7 sq mi
4,740 residents
Horton
88.2 sq mi
2,578 residents
Robinson
77.9 sq mi
527 residents

Population decline

Brown County lost 6.8% of residents between 2014 and 2024. ZIPs that shed the largest share:

Morrill
-32.3%
535 → 362 residents
Everest
-25.9%
656 → 486 residents

All ZIP Codes in Brown County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
66434HiawathaStandard4,740$76,613219.7-1.8%
66439HortonStandard2,578$53,34888.2-6.9%
66532RobinsonStandard527$76,87577.9-7.7%
66424EverestStandard486$58,55359.7-25.9%
66425FairviewStandard391$61,09449.71.3%
66515MorrillStandard362$89,37537.4-32.3%
66527PowhattanStandard244$60,75035.8-9.3%

Adjacent & Nearby Counties