Blog · October 14, 2026 · Pennsylvania
Centre County Plat Book: finding and using one
With a lot near Millheim, plat books show ownership by township; the parcel viewer shows it today.
Main page: Centre County, PA GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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Looking for a Centre County plat book? It's a printed atlas of landownership, usually by township, and it's handy for land around Centre Hall. This Centre County guide covers: what's in a plat book, where to look for printed copies, and how the county viewer fills the gaps.
Getting started with the Centre County plat book
With a lot near Milesburg, a plat book is a privately published atlas, with owner names on each tract, usually township by township.
Getting to the right map
Go first to the PASDA Pennsylvania Tax Parcels viewer; it maps every tax parcel around Boalsburg and Millheim. When a rural tract has no street number, follow US Route 322 on the aerial until the lines appear, then click inside the one you want, which applies near Baileyville as much as anywhere. If you're looking near Casanova, save the parcel ID from that panel; every office in the county asks for it first.
Legal descriptions in Pennsylvania
Rural deeds near Casanova are often described by metes and bounds, listing bearings, distances and landmarks. Platted lots around Centre Hall are typically described by lot and block, making them easier to find. Write down the legal description for the tract near Bellefonte when you talk to a surveyor.
Recorded documents worth pulling
When the details count, pull the recorded deed through the Recorder of Deeds; the parcel line is a drawing of it, whether the land is near McCalls Dam State Park or elsewhere in the county. Long-held tracts around McCalls Dam State Park can go back through several deeds, so a title company earns its fee before a purchase.
Offices that can help
If the acreage or value on a parcel near Casanova looks off go to the county assessment office, the office behind the parcel record. Questions about what you can build around Boalsburg go to planning, building or health offices, and the answer depends on jurisdiction.
Where to look for one
Editions come and go depending on publishers, try the county extension office, recorder's office or library near Centre Hall.
Neighboring parcel maps
Centre County meets Blair County, Clearfield County, Clinton County, Huntingdon County, and Mifflin County, and each of those keeps its own parcel map. Acreage along the edge near Centre Hall can show up across two assessors' files, so look at the neighboring map as well. If you're looking near Centre Hall, our state page lists every bordering county map across Pennsylvania.
Limits of the parcel data
In and around Bellefonte, listed acreage is an assessed number; only a licensed surveyor sets the real lines on the ground. Owner names and values update on a schedule, so a recent sale near Centre Hall might lag behind.
Using the parcel viewer instead
For acreage around Baileyville, the PASDA Pennsylvania Tax Parcels viewer is updated more often than any atlas, across the county.
Why people still buy them
Farmers, hunters and appraisers near Centre Hall use plat books for a big-picture view of who owns what.
Atlas or legal document
For land near Howard, a plat book is not a recorded plat: the recorded plat at the Recorder of Deeds is a legal document, while the atlas is a reference.
A homemade atlas
Print parcel views near Aaronsburg township by township and keep them in a binder for the truck.
On site with the map
The parcel map usually runs in a mobile browser, handy when you're parked on a road near Aaronsburg, though signal can drop in rural spots. A saved image of the lot near Boalsburg and its lines keeps working without signal.
A quick look at the area
Bellefonte serves as the county seat, which is where the courthouse records live. You'll also find Ferguson Township, Centre Hall, Howard, and Milesburg, each with its own cluster of lots. Around 157,795 people live in Centre County (Census Bureau estimate, 2023) across roughly 1,109 square miles. Centre County dates to 1800, which matters when you trace an old farm's title. Features like Bald Eagle State Park are easy to spot when you zoom out.
Quick answers
Why does the plat book differ from the deed in Centre County?
Closer to Howard, plat book acreage and lines are approximate; don't rely on them for boundaries.
Are old plat books online around Milesburg?
Around Black Moshannon State Park, libraries and historical societies hold older editions; call ahead.
Is a plat book legal proof for land near Howard?
In and around Millheim, a plat book is a privately published atlas; use a surveyor for lines.
Who sells plat books in Centre County?
Generally, editions come and go.
Why do offices ask for the parcel ID near Milesburg?
It's the number the county assessment office uses to track a tract near Aaronsburg; copy it before you call anyone.
Open the official Centre County, PA 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.