Blog · October 14, 2026 · Ohio
The Mercer County Plat Book: an Ohio guide
Township atlases, old editions and current owners in Mercer County, starting near Mendon.
Main page: Mercer County, OH GIS & Parcel Viewer (official map link, Mercer County facts and neighboring maps).
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Old copies of the Mercer County plat book turn up at auctions and in kitchen drawers around Celina, and new ones are harder to track down. Here's what a plat book is, where to look for one in Mercer County, and the free official map that stays current between editions.
What's inside a county plat book
Private publishers compile plat books from county records, so a county edition is a snapshot of who owned land near Fort Recovery the year it was printed. Don't confuse it with a subdivision plat on file for lots in Celina; that recorded plat is a legal document, while the atlas is a reference.
Finding the tract on the Mercer County map
Mercer County publishes its parcels on the Mercer County ArcGIS parcel map, which runs on an Esri ArcGIS web map, free to use for a lot in Chickasaw or a property near Fort Recovery. Use the search box for an address in Chickasaw or a parcel number, or simply zoom in and click a property near Fort Recovery. Bookmark our Mercer County page too; it tracks the official Ohio link if it moves and lists the maps around Chickasaw.
Finding a printed Mercer County plat book
Private publishers have printed plat books for many rural counties, but editions for Mercer County come and go; inquire at the courthouse, the extension office or a farm supply store in Fort Recovery. Older editions are useful for family history around Celina, showing who held a farm decades ago.
Where Mercer County land records are kept
Deeds and plats behind the Mercer County map are kept by the county's recording office; the official Mercer County website names which office that is. Ohio county auditors handle real property appraisal, which means the Mercer County auditor's office is the source for values on the map. Copy the parcel ID and legal description from the county record well before you request a deed for land near Fort Recovery.
The lay of the land around Celina
Celina is the county seat, and Burkettsville, Chickasaw, Coldwater, and Fort Recovery are among the other towns on the county map. Smaller places such as Maria Stein, Carthagena, and Cassella appear on the county map as little clusters of lots. Mercer County had an estimated 42,439 people in 2023 (Census Bureau), spread across about 462 square miles. The Mercer County map mixes subdivision lots near Mendon with farm and wooded tracts farther out. Mercer County was organized in 1824, so deeds for older farms near Burkettsville can run back a long way.
Atlas details and limits
Many atlases add rural residence listings and road maps, handy on back roads near Carthagena. Owner names in an older Mercer County edition may be decades out of date, so confirm on the county map before contacting anyone near Carthagena. If you use a plat book for hunting permission near Coldwater, recheck the landowner on the county map first.
Making your own atlas of Mercer County
Farm families near Montezuma frequently keep successive editions of the Mercer County plat book, which together show how ownership shifted over decades. Saving PDFs of the county map around Carthagena gives you an offline reference when the signal drops.
What drives land use around Celina
County Business Patterns counted 1,050 business establishments in Mercer County for 2022, led by retail trade, other services, and construction. Compared with national shares, Mercer County leans toward textile product mills and agriculture and forestry support services, which shapes demand for land near Chickasaw.
The free online alternative
For current ownership, the free Mercer County ArcGIS parcel map beats any printed book: owners update as deeds are processed, and you can click any property near Fort Recovery. Phone signal can be thin near Carthagena, so save the parcel IDs you need well before you head out.
Mercer County plat book questions
Does a Mercer County plat book show property lines?
Only roughly; a Mercer County plat book is a reference, so a boundary survey decides the real line.
What is the difference between a plat book and a plat in Mercer County?
No; a lot in Chickasaw answers to its recorded plat, and the county atlas is only a guide.
Can I buy a new plat book for Mercer County, Ohio?
It depends on if a publisher has a county edition in print; local offices in Chickasaw generally know.
Are older plat books for Mercer County, Ohio online?
Some libraries and historical societies keep older Mercer County atlases; ask what's available near Montezuma.
Should I use the Mercer County, Ohio parcel map instead of a plat book?
For current owners near Montezuma, yes; the Mercer County ArcGIS parcel map updates as deeds are processed.
Open the official Mercer County, OH parcel map Mercer 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.