County · code 20131
Nemaha CountyKansas
Nemaha County is a county in Kansas, with its seat at Seneca. It was created by Kansas Territory in 1855.
- Founded1855
- County seatSeneca
- Named forNemaha River basin, Nebraska
- Land area717 sq mi + 2 sq mi water
- Population10,273 2020 Census
- Parcels mapped8,771 checked 15 October 2026
Where it is
Nemaha on the map of Kansas
Kansas has 105 counties and county equivalents, each with its own records office. Shapes with a page are links.
History
Founded in 1855
An old deed may name a county that no longer exists, or a boundary that has since moved.
Nemaha County was created by Kansas Territory from non-county area on August 25, 1855. It became a county in the state of Kansas on January 29, 1861.
- 1855Nemaha County created Nemaha created by Kansas Territory from non-county area. · Kans. Terr. Laws 1855, 1st leg., ch. 30, sec. 30/p. 210
- 1857Boundary clarified Nemaha boundaries redefined to run on federal land survey lines (no change).no change· Kans. Terr. Laws 1857, 2d leg., sec. 30/p. 44
- 1861Became part of Kansas Nemaha became a county in the state of Kansas. · U.S. Stat., vol. 12, ch. 20 [1861]/pp. 126-128; Van Zandt, 138-139
Land and parcels
What the maps cover in Nemaha
Who publishes each layer, how good it is, and when we last checked.
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Parcels Good enough
Lot lines and tax-map numbers for 8,771 parcels. Drawn for tax purposes: usually within a few feet of a survey, but not a survey.
edited 17 January 2025 · checked 15 October 2026 -
Address points Official
One point per address, 5,696 in all from Kansas 911 Coordinating Council NG911 program, hosted by DASC (Data Access and Support Center for the Kansas GIS Policy Board).
edited 13 July 2026 · checked 13 October 2026 -
Buildings Reference
Roof outlines traced from aerial imagery from FEMA Response Geospatial Office with Oak Ridge National Laboratory (ORNL). Good for seeing what is on a lot; not accurate enough to set a fence from.
checked 18 October 2026
- Official
- from the office that keeps the record
- Good enough
- a reliable statewide or national copy
- Fallback
- a guide only; check the official record
- Missing
- nothing public found yet
People and land
Nemaha by the Census
Source: US Census Bureau, 2020 Census; US Census Bureau, 2020 Gazetteer Files. Not endorsed or certified by the Census Bureau.
Rules and offices
Nemaha County's official site
We have found the county's site but not its offices yet; start there.
County government
- County government
The official website of Nemaha County.
See your own lot on these maps
Open Nemaha County on Parcel Chart's free map and click your parcel. Save it with a free account; the full record of your place (site map, projects, documents) is Pro, in early access.
Questions
Common questions about Nemaha County
- When was Nemaha County founded?
- Nemaha County was founded in 1855, and named after Nemaha River basin, Nebraska.
- What is the county seat of Nemaha County?
- The county seat of Nemaha County is Seneca.
- Is there an online parcel map for Nemaha County?
- Yes. A public source publishes a parcel map of 8,771 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
- Has Nemaha County's boundary or name changed?
- Nemaha County was created in 1855. Since then the Atlas of Historical County Boundaries records 1 later change.
- Is my lot in a flood zone?
- We do not have flood maps for Nemaha County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.
Nearby