Blog · October 14, 2026 · Idaho
The Cassia County Plat Book: an Idaho guide
What a Cassia County plat book is, where to locate one around Declo, and the free map that covers the gaps.
Main page: Cassia County, ID GIS & Parcel Viewer (official map link, Cassia County facts and neighboring maps).
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A Cassia County plat book is the township-by-township atlas farmers, hunters and land buyers around Declo have kept in the truck for generations. Below is how to track one down for Cassia County, ID, and what the online map does better.
What a Cassia County plat book is
A plat book, sometimes called a land atlas, displays each township in Cassia County as a page, with ownership blocks labeled by owner name and rough acreage. Don't confuse it with a subdivision plat on file for lots in Malta; that recorded plat is a legal document, while the atlas is a reference.
The county map you'll pair it with
For land around Albion, open the Cassia County ArcGIS parcel map (an Esri ArcGIS web map); it's the map Cassia County itself publishes. Click any Cassia County parcel near Oakley to open its record: owner, parcel ID and assessed acreage are most commonly listed. Bookmark our Cassia County page too; it tracks the official Idaho link if it moves and lists the maps around Oakley.
From Burley to the back roads
Town lots cluster around Burley, the county seat, and Albion, Declo, Malta, and Oakley. Smaller places such as Almo, Artesian City, and Idahome appear on the county map as little clusters of lots. Census Bureau estimates put Cassia County at about 25,696 residents in 2023 on roughly 2,566 square miles of land. Beyond the town lots in Albion, expect big rural parcels across the county. Landforms such as the Albion Mountains and Magic Valley shape where roads and homesites fall in the county. With a founding date of 1879, Cassia County has long chains of title on some rural tracts.
Cassia County land records
Deeds and plats behind the Cassia County map are kept by the county's recording office; the official Cassia County website names which office that is. A deed book and page or instrument number on the county record is the fastest way to order the document for a lot in Declo.
Current and older editions
Whether a current Cassia County edition exists varies, so ask locally in Declo before ordering; county offices commonly know if one is in print. Older editions are useful for family history around Malta, showing who held a farm decades ago.
What a plat book page displays near Declo
A typical atlas page for a township near Declo displays sections, roads and streams, with each ownership block labeled. Acreage printed in a county atlas is rough; the deed and a licensed survey decide the real figure for a property near Burley. Genealogists in Idaho commonly pair an old Cassia County atlas with deed records to follow a farm through the generations.
Making your own atlas of Cassia County
Names in an older Cassia County atlas can lead you to the right deed in the grantor-grantee index for land near Artesian City. Saving PDFs of the county map around Artesian City gives you an offline reference when the signal drops.
Work and land use in Cassia County
County Business Patterns counted 767 business establishments in Cassia County for 2022, led by retail trade, health care and social assistance, and construction. Agriculture and forestry support services and mining (except oil and gas) make up an above-average share of Cassia County businesses, a clue to how land around Albion gets used.
The free online alternative
For current ownership, the free Cassia County ArcGIS parcel map beats any printed book: owners update as deeds are processed, and you can click any property near Declo. Phone signal can be thin near Artesian City, so save the parcel IDs you need before you head out.
Quick answers for Cassia County
Can I use a plat book to locate lot lines near Malta?
Only roughly; a Cassia County plat book is a reference, so a licensed survey decides the real line.
Can I buy a new plat book for Cassia County, Idaho?
It depends on if a publisher has a county edition in print; local offices in Malta most commonly know.
What is the difference between a plat book and a plat in Cassia County?
No; a lot in Malta answers to its recorded plat, and the county atlas is just a reference.
Where can I locate old plat books for Cassia County, Idaho?
Check the library in Malta, local historical groups and estate sales for older Cassia County editions.
Is the Cassia County, Idaho online map better than a plat book?
For current owners near Albion, yes; the Cassia County ArcGIS parcel map updates as deeds are processed.
Open the official Cassia County, ID parcel map Cassia County 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.