Blog · October 14, 2026 · Montana
Musselshell County Plat Book, Montana: what to know
For a parcel near Klein, plat books show ownership by township; the parcel viewer shows it today.
Main page: Musselshell County, MT GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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Want a copy of the Musselshell County plat book? These atlases map who owns rural land, page by page, useful for farms near Melstone. In this county guide: what's in a plat book, where to look for printed copies, and how the county viewer fills the gaps, at least around Delphia.
Getting started with the Musselshell County plat book
For acreage around Melstone, a plat book is a privately published atlas, with owner names on each tract, often organized by township.
The free map to start with
For a parcel near Lake Mason National Wildlife Refuge, the no-cost parcel map for this area is the Montana Cadastral, and it opens in a browser with no account. Without an address in hand, zoom in from Queens Point and click the parcel itself. On ground around Delphia, write down the parcel ID from that panel; each clerk in the county will want it.
Next door to Musselshell County
Musselshell County borders Fergus County, Golden Valley County, Petroleum County, Rosebud County, and Yellowstone County, and each of those keeps its own parcel map. Ground near Klein that runs to the line may be split in two county records, so open the neighboring map as well. For acreage around Roundup, the Platbookmapper state page links every neighboring county map for Montana.
How land is described here
Montana follows the Public Land Survey System, so deeds around Lake Mason National Wildlife Refuge reference sections and townships. A standard section is about one square mile, roughly 640 acres, and a township holds 36 of them, though real sections near Lake Mason National Wildlife Refuge vary in size. Write down the legal description for the tract near Delphia when you talk to a surveyor.
Who uses plat books
Buyers and seed dealers around Delphia rely on them for a big-picture view of who owns what.
A word on accuracy
For property near Delphia, acreage on the record is an assessed number; only a licensed surveyor can set the real lines on the ground. For acreage around Roundup, owner names and values update on a schedule, so a deed recorded last month may not show yet.
Editions and availability
Editions come and go depending on publishers, try the county extension office, recorder's office or library near Lake Mason National Wildlife Refuge.
Taking the map into the field
Most viewers work in a phone browser, which helps when you're standing on land near Klein, though signal can drop in rural spots. A screenshot of the parcel near Delphia with its ID keeps working without signal.
Which office to call
If the acreage or value on a parcel near Queens Point looks off go to the Montana Department of Revenue, the office behind the parcel record. Building or septic questions for a lot near Delphia go to planning, building or health offices, and the answer depends on jurisdiction.
A homemade atlas
Print parcel views near Klein township by township and keep them in a binder for the truck.
Getting your bearings
Roundup serves as the county seat, where most land records are kept. You'll also find Melstone, Delphia, Elso, and Klein, where town lots give way to larger tracts. About 5,308 people live in Musselshell County (Census estimate, 2023) spread over about 1,869 square miles. The county dates to 1911, and some chains of title near Queens Point are long. Places such as Lake Mason National Wildlife Refuge make handy reference points on the map.
Using the parcel viewer instead
For current names, use the Montana Cadastral, across the county, whether the land is near Melstone or elsewhere in the county.
Recorded documents worth pulling
On ground around Lake Mason National Wildlife Refuge, the map is an index, not the title: deeds, subdivision plats and easements for parcels in the county sit with the County Clerk and Recorder. For a parcel near Klein, bring the book and page listed on the parcel record to skip a name search.
Two kinds of plat
Around Klein, don't confuse the atlas with a recorded subdivision plat: the recorded plat at the County Clerk and Recorder is a legal document, while the atlas is a reference.
Musselshell County: common questions
Is there a current Musselshell County plat book?
For land near Klein, it depends on whether a publisher has a current edition; ask local offices.
Are old plat books online in Musselshell County?
For property near Melstone, libraries and historical societies hold older editions.
Is a plat book legal proof in Musselshell County?
If you're looking near Roundup, a survey sets boundaries, not an atlas.
Are plat book lines exact near Melstone?
It depends, but atlas drawings near Klein are simplified.
How do I save a parcel from the viewer near Lake Mason National Wildlife Refuge?
Out toward Elso, some viewers offer PDF export; downloads of raw data vary by county.
Open the official Musselshell 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.