Blog · October 14, 2026 · Idaho
Using a Blaine County Plat Book today
On ground around Bellevue, plat books show ownership by township; the parcel viewer shows it today.
Main page: Blaine County, ID GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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Hunting for the latest Blaine County plat book? It's a printed atlas of landownership, usually by township, useful for farms near Salmon-Challis National Forest. Covered here for Blaine County: what's in a plat book, where to look for printed copies, and how the county viewer fills the gaps.
Getting started with the Blaine County plat book
For property near Carey, a plat book is a privately published atlas, with owner names on each tract, page by page across the county.
Getting to the right map
On ground around Triumph, the no-cost parcel map for this area is the Idaho statewide Parcels layer in ArcGIS Map Viewer, and anyone can open it without signing up. Without an address in hand, follow the nearest road on the aerial and click the parcel itself, which applies near Craters of the Moon National Monument as much as anywhere. For a home near Carey, a pop-up or side panel normally shows the owner of record, assessed acreage, the parcel number and sometimes recent sales.
Editions and availability
Not every county has a current edition, so ask at the courthouse, extension office or a local library near Minidoka National Wildlife Refuge.
Between editions
In and around Ketchum, the Idaho statewide Parcels layer in ArcGIS Map Viewer is updated more often than any atlas, across the county.
Where the recorded documents are
The map is an index, not the title: recorded deeds, subdivision plats and easements for land near Minidoka National Wildlife Refuge are filed with the County Recorder (the county clerk serves as recorder). For land near Craters of the Moon National Monument, bring the instrument number shown in the record panel and the lookup takes minutes.
On site with the map
Most viewers work in a phone browser, useful out on a road near Craters of the Moon National Monument, so load it before you lose signal. A saved image of the lot near Bellevue and its lines keeps working without signal.
What the map can't tell you
For land near Picabo, listed acreage is an estimate; only a licensed surveyor sets the real corners on the ground. On ground around Salmon-Challis National Forest, owner names and values update on a schedule, so a deed recorded last month might lag behind.
Who uses plat books
Buyers and seed dealers around Craters of the Moon National Monument rely on them to see ownership across many tracts at once.
Sections, lots and bearings
Idaho follows the Public Land Survey System, which means a tract near Craters of the Moon National Monument is described by section, township and range. A standard section is about one square mile, roughly 640 acres, and a township holds 36 of them, though sections near Craters of the Moon National Monument can be irregular. Copy the legal description from the record for the parcel near Craters of the Moon National Monument before you request a deed or survey.
Which office to call
Anything recorded against property around Gannett are with the County Recorder (the county clerk serves as recorder), sometimes only in person. Zoning, permits and septic questions near Sun Valley are for the local planning and health departments, and the answer depends on jurisdiction.
Printing your own
Print parcel views near Hailey township by township and keep them in a binder for the truck.
Two kinds of plat
Don't confuse the atlas with a recorded subdivision plat: recorded plats near Carey are filed with the County Recorder (the county clerk serves as recorder), while the atlas is a reference.
Neighboring parcel maps
Blaine County meets Bingham County, Butte County, Camas County, Cassia County, and Custer County, all with their own assessor records. A tract near the line by Picabo may show up across two assessors' files, so look at the adjacent map as well. For a tract near Craters of the Moon National Monument, our state page lists each neighboring county map across Idaho.
Blaine County in a few facts
Hailey is the county seat, which is where the courthouse records live. Smaller places on the map include Bellevue, Carey, Ketchum, and Sun Valley. Around 25,041 people call Blaine County home (Census estimate, 2023) on roughly 2,638 square miles. Blaine County was organized in 1895, so old deeds can run back a long way. Landmarks such as Craters of the Moon National Monument make handy reference points on the map.
Blaine County: common questions
How accurate are plat book acreages for land near Hailey?
For a tract near Gannett, the deed and a survey decide; they're good for orientation.
Can I use a plat book for a boundary near Carey?
For property near Craters of the Moon National Monument, a survey sets boundaries, not an atlas; check the deed.
Should I use the Idaho statewide Parcels layer in ArcGIS Map Viewer instead in Blaine County?
For a tract near Minidoka National Wildlife Refuge, the Idaho statewide Parcels layer in ArcGIS Map Viewer is free and updated more often; many people use both.
Where can I find old plat books near Gannett?
If the land is near Gimlet, some older atlases have been digitized; call ahead.
Is the parcel map a survey for land near Hailey?
The map near Craters of the Moon National Monument is approximate, so a fence may sit off the line
Open the official Blaine County, ID 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.