Nemaha County, Kansas

Nemaha County, Kansas, has 10,054 residents (July 2025 estimate). Its county seat is Seneca. It uses Central Time and covers 717 sq mi (1,858 km²) of land.

Nemaha County in Kansas

Nemaha County and its neighbors (simplified outlines). Open in OpenStreetMap ↗

Resident population, July 2025: 10,054
Land area: 717 sq mi (1,858 km²)
County seat or government: Seneca
Time zone: Central TimeUTC-06:00 in January; UTC-05:00 in July
Median household income: $77,348 ± $5,680
Median home value: $217,200 ± $14,110
Median rent, with utilities: $774 ± $131
Homes lived in by their owners: 78% ± 3.5 points
County type: County
Metro or micro area: Outside any metro or micro areaNext to: Manhattan, KS metro area and Topeka, KS metro area
Water area: 2.01 sq mi (5.2 km²)
State: Kansas
County code (FIPS): 20131
Coordinates (central point): 39.791043, -96.005381

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These coordinates mark a central point for the area, not a street address. Income, home value, rent and homes lived in by their owners: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, ± margin at 90% confidence; checked on October 13, 2026.

Time zones in Nemaha County

Time zone	Local time and UTC offset	Next clock change
Central TimeAmerica/Chicago	UTC-06:00 in January; UTC-05:00 in July. Enable JavaScript for the live clock.	Enable JavaScript for upcoming changes.

Near a time-zone line, check where you are with the time-zone finder. Your phone’s setting can differ.

ZIP Code areas, largest first

665383,602 people
665343,381 people
665211,417 people
684201,255 people
66403801 people
66415762 people
66540582 people
66550552 people
66432540 people
66416522 people
66417507 people
66404481 people

All 16

66408427 people
66544287 people
66428246 people
66522130 people

16 ZIP Code areas overlap Nemaha County. People counts are 2020–2024 estimates for each whole ZIP area. Mailing ZIPs can differ; check an address with USPS ZIP Code Lookup.

Official county information

We don’t have a website for this county yet. The US government’s local-office directory ↗ lists its offices. A geographic lookup cannot determine eligibility, tax liability or a court obligation.

Townships in Nemaha County, largest first

All 20

People counts are American Community Survey 2020–2024 5-year estimates. All townships in Kansas, by county

School districts in Nemaha County, largest first

Prairie Hills Unified School District 1136,159 people
Hiawatha Unified School District 4155,627 people
Nemaha Unified School District 1154,243 people
Vermillion Unified School District 3802,820 people
North Jackson Unified School District 3352,353 people
Onaga-Havensville-Wheaton Unified School District 3221,944 people

Districts with land in the county; a district can cross county lines. People counts are American Community Survey 2020–2024 5-year estimates. A district boundary doesn’t decide which school a student attends.

Cities, towns and communities, largest first

These areas overlap the mapped boundary; an overlap does not mean that every address belongs to both.

Bordering areas, nearest first

Distances are straight lines between map points.

Brown County, Kansas23 mi east
Pawnee County, Nebraska27 mi northwest
Marshall County, Kansas27 mi west
Richardson County, Nebraska28 mi northeast
Jackson County, Kansas29 mi southeast
Pottawatomie County, Kansas33 mi southwest

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Find the county where you are now, check its ZIP area, or check the time zone where you are.

See this county on Census.gov ↗

Areas that only touch the edge

These areas meet the boundary only along a sliver. Most addresses here are not in them; for an address near the line, check with the county.