Blog · October 14, 2026 · North Dakota
The Slope County Plat Book and the online parcel map
For property near Marmarth, plat books show ownership by township; the parcel viewer shows it today.
Main page: Slope County, ND GIS & Parcel Viewer (official map link, county facts and neighboring maps).
Platbookmapper is an Amazon Associate. If you buy through an Amazon link on this page, we earn a commission. The link is a product, not the county map.
Want a copy of the Slope County plat book? A plat book shows owners and tract lines on township pages, and it's handy for land around Stewart Lake National Wildlife Refuge. What this Slope County guide covers: how the atlas is organized, where to find editions, and how the county viewer fills the gaps.
Tracking down a Slope County plat book
Town lots near Stewart Lake National Wildlife Refuge are usually too small to label, so the online map is better for those.
Opening the official parcel viewer
Parcels around Amidon are published on the Slope County parcel viewer, a viewer that needs no account. Without an address in hand, follow the nearest road on the aerial and click the parcel itself, whether the land is near Marmarth or elsewhere in the county. For a tract near Little Missouri National Grassland, save the parcel ID before closing the panel; each office in the county will want it.
Field tips
The parcel map usually runs in a mobile browser, useful out on a road near Amidon, though signal can drop in rural spots. A printout of the tract near Marmarth is a good backup.
Editions and availability
Older editions near Little Missouri National Grassland turn up in libraries and historical societies, which helps when tracing a farm's history.
Reading the legal description
North Dakota uses the Public Land Survey System, so deeds around Marmarth reference sections and townships. Each section is nominally a mile square, about 640 acres, and a township holds 36 of them, though real sections near Stewart Lake National Wildlife Refuge vary in size. Copy the legal description from the record for the parcel near White Lake National Wildlife Refuge before you request a deed or survey.
Why people still buy them
Farmers, hunters and appraisers near White Lake National Wildlife Refuge use plat books for a big-picture view of who owns what.
Making your own township pages
Screenshot each section of the viewer around Amidon and keep them in a binder for the truck.
Getting your bearings
Amidon is the county seat, home to the main records offices. Other places on the map include Marmarth, Little Missouri National Grassland, Stewart Lake National Wildlife Refuge, and White Lake National Wildlife Refuge, where town lots give way to larger tracts. About 674 people call Slope County home (Census Bureau estimate, 2023) spread over about 1,215 square miles. The county dates to 1914, and some chains of title near Marmarth are long. Features like Little Missouri National Grassland are easy to spot when you zoom out.
Using the parcel viewer instead
For current names, use the Slope County parcel viewer, including rural land around Little Missouri National Grassland.
Which office to call
Anything recorded against property around Stewart Lake National Wildlife Refuge sit in the index kept by the County Recorder, usually searchable by name or document number. Zoning, permits and septic questions near Marmarth are for the local planning and health departments, and the answer depends on jurisdiction.
Where the recorded documents are
When the details count, pull the recorded deed from the County Recorder; the parcel map near Stewart Lake National Wildlife Refuge only summarizes it. On ground around Stewart Lake National Wildlife Refuge, use the document number from the tax record and the lookup takes minutes.
What the map can't tell you
Acreage on the record is an estimate; just a licensed surveyor establishes the real boundary on land around Stewart Lake National Wildlife Refuge. For acreage around Little Missouri National Grassland, owner names and values update on a schedule, so a deed recorded last month can take weeks to appear.
Next door to Slope County
Slope County borders Fallon County, MT, Adams County, Billings County, Bowman County, and Golden Valley County, and each of those keeps its own parcel map. A tract near the line by Little Missouri National Grassland may show up in two county records, so check the adjacent map too. If you're looking near Stewart Lake National Wildlife Refuge, the Platbookmapper state page lists each bordering county map for North Dakota.
Not the same thing
For property near Amidon, a plat book is not a recorded plat: the recorded plat at the County Recorder is a legal document, and the atlas is just a guide.
Slope County: common questions
Is a plat book legal proof near White Lake National Wildlife Refuge?
For a parcel near Little Missouri National Grassland, a survey sets boundaries, not an atlas.
Why does the plat book differ from the deed for land near Amidon?
In and around Little Missouri National Grassland, plat book acreage and lines are approximate.
How do I research old landowners for land near White Lake National Wildlife Refuge?
If the land is near White Lake National Wildlife Refuge, some older atlases have been digitized.
Plat book or parcel viewer for land near White Lake National Wildlife Refuge?
Good question; the viewer covers town lots near White Lake National Wildlife Refuge too.
What's a legal description for land near Marmarth?
For a home near Little Missouri National Grassland, it's the formal description of the land in the deed, and the parcel record often summarizes it.
Open the official Slope County, ND parcel map See it in the Platbookmapper directory
Not a survey. County GIS and tax parcel maps are assessment and planning layers. They are not a substitute for a recorded plat, deed, or licensed survey, especially for fences, setbacks, or boundary disputes.