Blog · October 14, 2026 · South Dakota
The Dewey County Plat Book and the online parcel map
For a tract near Green Grass, plat books show ownership by township; the parcel viewer shows it today.
Main page: Dewey County, SD GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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Hunting for the latest Dewey County plat book? A plat book shows owners and tract lines on township pages, popular with hunters, farmers and buyers near North Eagle Butte. What this county guide covers: how the atlas is organized, where to find editions, and the free online map that stays current, especially near Lantry.
Getting started with the Dewey County plat book
For a tract near Swift Bird, a plat book is a privately published atlas, with owner names on each tract, page by page across the county.
Opening the official parcel viewer
Your first stop is the Dewey County CAMAvision map; it covers each tax parcel from La Plant to Timber Lake. Out toward Swift Bird, enter a street address, an owner's name or a parcel number, and the viewer zooms to the match. Closer to La Plant, save the parcel ID before closing the panel; every records desk in the county will want it.
Next door to this county around Green Grass.
The county touches Corson County, Haakon County, Potter County, Stanley County, and Sully County, all with their own assessor records around North Eagle Butte. Ground near Green Grass that runs to the line can show up across two assessors' files, so check the adjacent map as well. For a parcel near La Plant, the Platbookmapper state page lists every bordering county map across South Dakota.
Making your own township pages
Screenshot each section of the viewer around Eagle Butte and keep them in a binder for the truck.
Buying or borrowing a copy
Older editions near Eagle Butte turn up in libraries and historical societies, useful for family or title research.
A word on accuracy
Out toward Timber Lake, listed acreage is a tax-roll number; just a licensed surveyor sets the real boundary on the ground. For land near Eagle Butte, records update in batches, so a deed recorded last month might lag behind.
Using the parcel viewer instead
Between printed editions, the Dewey County CAMAvision map shows current owners, across the county.
Field tips
The parcel map usually runs in a mobile browser, handy when you're parked on a road near Lantry, though signal can drop in rural spots. A screenshot of the parcel near Lantry with its ID is a good backup.
How land is described here
South Dakota is laid out under the Public Land Survey System, so deeds around Timber Lake reference sections and townships. Each section is nominally a mile square, about 640 acres, and a township holds 36 of them, though sections near Timber Lake can be irregular. Keep the legal description for land near Green Grass before you request a deed or survey.
Places you'll see on the map
Timber Lake holds the county offices, home to the main records offices. Other places on the map include Eagle Butte, Isabel, Green Grass, and La Plant. Around 5,208 people live in Dewey County (Census Bureau estimate, 2023) across some 2,302 square miles. Features like Missouri River make handy reference points on the map near Timber Lake.
Who uses plat books
Farmers, hunters and appraisers near La Plant use plat books for a big-picture view of who owns what.
Recorded documents worth pulling
For land near Green Grass, the map is an index, not the title: recorded deeds, plats and easements for parcels in the county are kept by the Register of Deeds. In and around Swift Bird, have ready the instrument number shown in the record panel and the lookup takes minutes.
Two kinds of plat
In and around Timber Lake, a plat book is not a recorded plat: the recorded plat at the Register of Deeds is a legal document, and the atlas is just a guide.
Who handles what
Recorded documents for a parcel near La Plant come from the Register of Deeds, often with an online index. Zoning, permits and septic questions near Eagle Butte are for the local planning and health departments, town or county, depending on location.
Frequently asked
Is a plat book legal proof around Missouri River?
For a tract near Green Grass, a survey sets boundaries, not an atlas.
Plat book or parcel viewer in Dewey County?
It depends, but the county CAMAvision map is free and updated more often; a printed atlas is still handy offline around North Eagle Butte.
How do I research old landowners for land near La Plant?
In and around Lantry, some older atlases have been digitized; availability varies.
Who sells plat books in Dewey County?
Closer to Isabel, it depends on whether a publisher has a current edition.
Who keeps deeds for property in Dewey County?
For property near Lantry, values are the Director of Equalization's job; recorded documents belong to the Register of Deeds.
Open the official Dewey County, SD 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.