ZIP Codes of Doniphan County, KS

Population & People
Population & People
Total Population
7,420
Household Income
Household Income
Median Income
$77,923
Housing
Housing
Total Housing Units
3,346
Business & Economy
Business & Economy
Total Businesses
163
Employment
Employment
Employment Rate
61.17%
Education
Education
Bachelor's Degree+
21.76%
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 (6 Standard, 1 PO Box, 0 Unique) [See All]
Area Codes:785 / 913
Timezone:Central (GMT -06:00)
Local Time:2:12:11 PM
Population:7,420 [See All]
FIPS:20043
CBSA:St. Joseph, MO-KS
Land Area:379 sq mi
Water Area:5 sq mi
Coordinates:39.7960, -95.1456
Quick Link:
https://www.zip-codes.com/county/ks-doniphan.asp
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Kansas's #50 most populous county
7,420 residents across 7 ZIPs — #50 of 106 Kansas counties.

Standout ZIPs in this County


Most Populous
Wathena · 2,380 people
32.1% of county total
Highest Income
Highland · $97,895 median
1.3× county average
Largest Land Area
Troy · 116.0 sq mi
Spans the most ground
Fastest Growth
Troy · 3.3% (10-yr)
1,962 → 2,027 residents
Most Educated
Wathena · 23.6% bachelor's+
419 of 1,779 adults 25+

Things worth knowing about Doniphan County


7,420 residents live across 7 ZIPs covering 379 sq mi, served by 7 distinct USPS-recognized cities.

Population moved from 7,830 to 7,420 from 2014 to 2024 — a -5.2% change. 1 ZIPs gained residents, 6 lost.

The county's wealthiest ZIP 66035 (Highland, $97,895 median) and poorest ZIP 66087 (Troy, $56,875) are 7.6 miles apart — a 1.7× income gap across local geography.

Median home values vary 3.2× across this county — from $67,800 in 66024 (Elwood) to $217,600 in 66008 (Bendena).

Density varies 5284× across the county — from 6 people/sq mi in 66008 (Bendena) to 31,836 in 66024 (Elwood).

Educational attainment ranges from 6.2% bachelor's+ in 66024 (Elwood) to 34.9% in 66035 (Highland) — the breadth of educational profiles across the area.

Within Kansas, this is the #50 most populous of 106 counties and ranks #18 for median household income .

Weighted by population, the typical household earns about $77,464 across the county — reflecting what a typical resident sees, not a simple ZIP average.

21.8% of adults age 25+ hold a bachelor's degree or higher (1,072 of 4,926 reporting).

6 Standard delivery, 1 PO Box only, 0 single-entity Unique ZIPs serve this county.

Stories about Doniphan County


Population decline

Doniphan County lost 5.2% of residents between 2014 and 2024. ZIPs that shed the largest share:

White Cloud
-13.3%
504 → 437 residents
Elwood
-10.7%
913 → 815 residents

All ZIP Codes in Doniphan County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
66090WathenaStandard2,380$87,02594.6-5.5%
66087TroyStandard2,027$56,875116.03.3%
66035HighlandStandard1,342$97,89559.1-0.1%
66024ElwoodPO Box815$68,1250.0-10.7%
66094White CloudStandard437$72,00041.5-13.3%
66017DentonStandard219$68,75034.6-36.9%
66008BendenaStandard200$94,79233.2-17.4%

Adjacent & Nearby Counties