County · code 38087
Slope CountyNorth Dakota
Slope County is a county in North Dakota, with its county seat in Amidon. It was formed in 1914.
- Founded1914
- County seatAmidon
- Land area1,215 sq mi + 4.2 sq mi water
- Population706 2020 Census
- Parcels mapped3,108 checked 14 October 2026
Where it is
Slope on the map of North Dakota
North Dakota has 53 counties and county equivalents, each with its own records office. Shapes with a page are links.
History
Formed in 1914 from Billings County
An old deed may name a county that no longer exists, or a boundary that has since moved.
Slope County was created from Billings County on November 3, 1914, following a vote of 740 to 356 in favor of creating the county, though it was not initially fully organized. The county became fully organized on January 14, 1915.
- 1914Slope County created Slope created from Billings; vote to create Slope passed 740 to 356. Slope not fully organized, not attached. · Hall, 248
- 1915Changed Slope fully organized. · Hall, 248; North Dakota Blue Book, 452
Land and parcels
What the maps cover in Slope
Who publishes each layer, how good it is, and when we last checked.
-
Parcels Good enough
Lot lines and tax-map numbers for 3,108 parcels from State of North Dakota GIS Hub (NDIT; State Parcel Program, counties as custodians). Drawn for tax purposes: usually within a few feet of a survey, but not a survey.
edited 12 October 2026 · checked 14 October 2026 -
Address points Official
One point per address, 568 in all from State of North Dakota — NDGISHUB / ND Department of Emergency Services (owner NDGISHDP-DES).
edited 12 October 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
Slope 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
Slope 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 Slope County.
See your own lot on these maps
Open Slope 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 Slope County
- When was Slope County founded?
- Slope County was founded in 1914, formed from Billings County.
- What is the county seat of Slope County?
- The county seat of Slope County is Amidon.
- Is there an online parcel map for Slope County?
- Yes. State of North Dakota GIS Hub (NDIT; State Parcel Program, counties as custodians) publishes a parcel map of 3,108 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
- Has Slope County's boundary or name changed?
- Slope County was created in 1914 from Billings County. 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 Slope County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.
Nearby