Blog · October 14, 2026 · Oregon
Morrow County Plat Book, Oregon
What a Morrow County plat book is, where to find one around Irrigon, and the free map that covers the gaps.
Main page: Morrow County, OR GIS & Parcel Viewer (official map link, Morrow County facts and neighboring maps).
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Looking for a Morrow County plat book? Plenty of people around Lexington still want a paper atlas with owner names on every section. We'll cover what's in one, where Morrow County copies turn up, and how the county's free map fills the gaps.
What a Morrow County plat book is
A plat book, sometimes called a land atlas, lists each township in Morrow County as a page, with ownership blocks labeled by owner name and rough acreage. Deeds and recorded plats, not the atlas, still govern land near Clarke in the county.
The county map you'll pair it with
Morrow County parcels are viewed through a statewide map, the ORMAP statewide tax lot viewer; zoom toward Ione to reach them. Zoom to Morrow County, click a tax lot near Ione, and copy the map and tax lot number for the assessment search. If the official address for the Morrow County, OR map ever changes, our directory page carries the current link for Ione and the rest of the county.
Current and older editions
Try the library in Heppner or a local historical society for older Morrow County editions; libraries sometimes keep past atlases for reference. Collectors and genealogists prize old Morrow County atlases as they display farm names and owners near Clarke long before online maps.
What a plat book page lists near Heppner
Plat book pages for Morrow County generally include an index of owners, so you can find a family name near Ione without knowing the township. Small parcels and town lots in Heppner are frequently too small to label on an atlas page, which is another reason the online map is better for them. For a land purchase near Ione, rely on the county parcel record and a title search, not an atlas.
Making your own atlas of Morrow County
Names in an older Morrow County atlas can lead you to the right deed in the grantor-grantee index for land near Clarke. Some buyers print the county parcel map at township scale to carry on back roads near Irrigon.
The Morrow County economy in brief
County Business Patterns counted 215 business establishments in Morrow County for 2022, led by retail trade, accommodation and food services, and health care and social assistance. Forestry and logging and utilities make up an above-average share of Morrow County businesses, a clue to how land around Heppner gets used.
From Heppner to the back roads
From Heppner, the seat of the county, the map spreads out to Boardman, Ione, Irrigon, and Lexington. Smaller places such as Cecil, Clarke, and Eightmile appear on the county map as little clusters of lots. Census Bureau estimates put Morrow County at about 12,302 residents in 2023 on about 2,031 square miles of land. Outside Boardman, most of the county map is farm, ranch or timber ground with large, irregular tracts. Landforms such as the Black Mountain shape where roads and homesites fall in Morrow County.
Near the Morrow County line
Near the edge of the county, check the next map over: Gilliam County, Grant County, Umatilla County, Wheeler County, and Benton County, WA all border it. Our Oregon page links each map neighboring Morrow County.
The free online alternative
The ORMAP statewide tax lot viewer works as a living Morrow County plat book, with owner names and parcel lines over aerial photos of Morrow County. Pair the county map with a road atlas for the back roads near Boardman.
Quick answers for Morrow County
What is the difference between a plat book and a plat in Morrow County?
No; a lot in Lexington answers to its recorded plat, and the county atlas is just a reference.
Should I use the Morrow County, Oregon parcel map instead of a plat book?
For current owners near Heppner, yes; the ORMAP statewide tax lot viewer updates as deeds are processed.
Is there a current plat book for Morrow County, Oregon?
It depends on if a publisher has a county edition in print; local offices in Lexington generally know.
Does a Morrow County plat book display property lines?
Only roughly; a Morrow County plat book is a reference, so a survey decides the real line.
Where can I find old plat books for Morrow County, Oregon?
Check the library in Lexington, local historical groups and estate sales for older Morrow County editions.
Open the official Morrow County, OR parcel map Morrow 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.