Blog · October 14, 2026 · Montana
Sheridan County Plat Book: finding and using one
In and around Antelope, plat books show ownership by township; the parcel viewer shows it today.
Main page: Sheridan County, MT GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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Want a copy of the Sheridan County plat book? It's a printed atlas of landownership, usually by township, useful for farms near Medicine Lake. Covered here for Sheridan County: how the atlas is organized, where to find editions, and how the county viewer fills the gaps.
Getting started with the Sheridan County plat book
Closer to Comertown, plat books are commercial atlases, with owner names on each tract, usually township by township.
Where the parcel data lives
Begin with the Montana Cadastral; it covers each assessed parcel around Medicine Lake National Wildlife Refuge and Westby. If you're looking near Redstone, type a street address, an owner's name or a parcel number, then pick the result to center the map on it. If you're looking near Antelope, write down the parcel ID while you have it open; every records desk in the county will want it.
When a parcel crosses a boundary
Sheridan County meets Daniels County, Roosevelt County, Divide County, ND, and Williams County, ND, all with their own assessor records. A tract near the line by Plentywood can be split across two assessors' files, so check the neighboring map as well. For a home near Westby, the Platbookmapper state page links every neighboring county map across Montana.
Buying or borrowing a copy
Not every county has a current edition, try the county extension office, recorder's office or library near Westby.
Using it on a phone
The parcel map usually runs in a mobile browser, which helps when you're standing on land near Plentywood, though signal can drop in rural spots. A saved image of the lot near Plentywood and its lines keeps working without signal.
Which office to call
Questions about value or the owner field for land near Westby are handled by the Montana Department of Revenue, which maintains the tax roll. Zoning, permits and septic questions near Reserve need the planning or permitting office, and the answer depends on jurisdiction.
Who uses plat books
Farmers, hunters and appraisers near Redstone use plat books for a big-picture view of who owns what.
Getting your bearings
Plentywood is the county seat, where most land records are kept. You'll also find Medicine Lake, Outlook, Westby, and Antelope, where town lots give way to larger tracts. Roughly 3,498 people live in Sheridan County (Census Bureau estimate, 2023) on some 1,677 square miles. Sheridan County was formed in 1913, so old deeds can run back a long way. Features like Medicine Lake National Wildlife Refuge are easy to spot when you zoom out.
A homemade atlas
Screenshot each section of the viewer around Antelope to build your own up-to-date atlas.
Limits of the parcel data
For land near Medicine Lake National Wildlife Refuge, the acreage figure is a tax-roll number; only a licensed surveyor establishes the real corners on the ground. In and around Westby, records update in batches, so a deed recorded last month can take weeks to appear.
The free online alternative
For current names, use the Montana Cadastral, across the county, for land near Antelope included.
Backing up the map with records
When the details count, get the recorded deed through the County Clerk and Recorder; the viewer just points to it, whether the land is near Plentywood or elsewhere in the county. If you're looking near Outlook, use the document number listed on the parcel record to skip a name search.
Reading the legal description
Montana is laid out under the Public Land Survey System, so rural legal descriptions near Medicine Lake National Wildlife Refuge cite section, township and range. A standard section is about one square mile, roughly 640 acres, and a township holds 36 of them, though corrections make some sections near Antelope odd-sized. Keep the legal description for land near Homestead before you request a deed or survey.
Not the same thing
For a parcel near Homestead, a plat book is not a recorded plat: the recorded plat at the County Clerk and Recorder is a legal document, while the atlas is a reference.
Quick answers
Is there a current Sheridan County plat book?
It depends, but the extension office or courthouse near Reserve usually knows.
How do I research old landowners for land near Medicine Lake?
Closer to Homestead, some older atlases have been digitized; availability varies.
Should I use the Montana Cadastral instead around Westby?
If the land is near Comertown, the Montana Cadastral is free and updated more often; a printed atlas is still handy offline.
Is a plat book legal proof around Outlook?
In and around Outlook, a survey sets boundaries, not an atlas; use a surveyor for lines.
Is the parcel map a survey for land near Comertown?
No; boundary questions near Homestead need a licensed surveyor; a survey sets the real corners
Open the official Sheridan County, MT 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.