Blog · October 14, 2026 · Oregon
The Sherman County Plat Book and the online parcel map
Near Harmony, plat books show ownership by township; the parcel viewer shows it today.
Main page: Sherman County, OR GIS & Parcel Viewer (official map link, county facts and neighboring maps).
Platbookmapper is an Amazon Associate. If you buy through an Amazon link on this page, we earn a commission. The link is a product, not the county map.
Hunting for the latest Sherman County plat book? These atlases map who owns rural land, page by page, and it's handy for land around Rufus. What this Sherman County guide covers: how the atlas is organized, where to look for printed copies, and how the county viewer fills the gaps.
Getting started with the Sherman County plat book
For a home near Biggs Junction, a plat book is a privately published atlas, that map ownership across the countryside, page by page across the county.
Where the parcel data lives
Your first stop is the ORMAP statewide tax lot viewer; it includes each tax parcel from Biggs Junction to Hay Canyon. For land near Hay Canyon, put in a street address, an owner's name or a parcel number, and the viewer zooms to the match. For a parcel near Erskine, write down the parcel ID from that panel; each office in the county will want it.
Why people still buy them
Farmers, hunters and appraisers near Hay Canyon use plat books for a big-picture view of who owns what.
Where to look for one
Editions come and go depending on publishers, check with local offices and farm stores near Hay Canyon.
Between editions
For current names, use the ORMAP statewide tax lot viewer, across the county, and that holds around Harmony too.
Field tips
Most viewers work in a phone browser, which helps when you're standing on land near Harmony, so load it before you lose signal. A printout of the tract near Hay Canyon is a good backup.
Which office to call
Deeds, mortgages and recorded plats for land near De Moss Springs sit in the index kept by the County Clerk, usually searchable by name or document number. Building or septic questions for a lot near Hay Canyon go to planning, building or health offices, depending on whether the land is inside town limits.
A homemade atlas
Print parcel views near Biggs Junction township by township to build your own up-to-date atlas.
Reading the legal description
Oregon uses the Public Land Survey System, so rural legal descriptions near Rufus 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 Moro odd-sized. Keep the legal description for land near Biggs Junction when you talk to a surveyor.
A quick look at the area
Moro holds the county offices, home to the main records offices. Smaller places on the map include Grass Valley, Rufus, Wasco, and Biggs Junction, each with its own cluster of lots. Roughly 1,951 people call Sherman County home (Census estimate, 2023) on about 824 square miles. Sherman County dates to 1889, which matters when you trace an old farm's title.
Land on the county line
The county touches Gilliam County, Wasco County, and Klickitat County, WA, all with their own assessor records. Ground near Hay Canyon that runs to the line may be split in two county records, so open the neighboring map too. For a tract near Harmony, the Platbookmapper state page links every bordering county map for Oregon.
Limits of the parcel data
In and around Rufus, the acreage figure is a tax-roll number; only a licensed surveyor can set the real boundary on the ground. If the land is near Biggs Junction, owner names and values update on a schedule, so a deed recorded last month can take weeks to appear.
Deeds, plats and who keeps them
Out toward Moro, the map is an index, not the title: deeds, subdivision plats and easements for parcels in the county are kept by the County Clerk. If you're looking near Grass Valley, use the instrument number shown in the record panel and the lookup takes minutes.
Atlas or legal document
A plat book is not a recorded plat: recorded plats near Grass Valley are filed with the County Clerk, and the atlas is just a guide.
Quick answers
Where can I find old plat books near De Moss Springs?
For a parcel near Rufus, some older atlases have been digitized; call ahead.
Is a plat book legal proof in Sherman County?
If you're looking near Rufus, a plat book is a privately published atlas; use a surveyor for lines.
Who sells plat books in Sherman County?
It depends, but the extension office or courthouse near De Moss Springs usually knows; online parcel maps fill the gaps.
Why does the plat book differ from the deed around Biggs Junction?
On ground around Wasco, the deed and a survey decide; they're good for orientation.
Who keeps deeds for property in Sherman County?
With a lot near Harmony, the County Assessor handles values and the tax roll, and the County Clerk keeps deeds, while zoning questions go to planning
Open the official Sherman County, OR 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.