Blog · October 13, 2026 · Indiana
GIS Map of Posey County, Indiana
A practical guide to the Posey County GIS map: the official link, towns and land across the county, property lines, and where deeds are recorded.
Main page: Posey County, IN GIS & Parcel Viewer (official map link, Posey County facts and neighboring maps).
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Parcel lines, owner names and acreage for every tract from Mount Vernon to Mount Vernon are a few clicks away on the Posey County GIS map, and it costs nothing to use.
We'll cover the official map, the communities and terrain around Mount Vernon, how property lines work in Indiana, and where the deeds come from.
Getting into the Posey County WTH GIS map
The official map is the Posey County WTH GIS map, which runs on a WTH Technology GIS parcel site. Rural tracts in Posey County often have no street address, so try an owner search or simply pan to the area and click. Our Posey County, IN page keeps the current link if the official address changes.
Behind the map: land records in Posey County
The map near Mount Vernon is only as good as the deeds behind it, and those are kept in the county's recording office. Which office that is depends on how Indiana organizes it, so look it up on the Posey County government site before you call. For subdivision lots in Mount Vernon, the plat book and page on the record leads straight to the recorded plat.
Getting oriented in Posey County
The county seat is Mount Vernon, home to the courthouse. Posey County covers about 409 square miles of land; its 2023 population estimate from the Census Bureau was 25,040. That density means a real mix on the map: platted neighborhoods near Mount Vernon, and larger tracts on the rural roads. Public land in or near the county, including Harmonie State Park, changes how nearby private land sells.
Who uses the Posey County parcel map
A lot of different people around Mount Vernon rely on this map.
- People hunting for a few acres outside Mount Vernon use the parcel layer to sort tracts by size and spot ones with good road access.
- Unlisted land near Mount Vernon sometimes turns up this way: an empty parcel, an absentee owner, and a polite letter.
- For a new build outside Mount Vernon, the parcel record supplies the lot size and legal description a site plan needs.
Using the Posey County GIS map to find vacant land
A vacant-land search near Mount Vernon, step by step:
- Zoom out over the countryside around Mount Vernon with the aerial layer on, and look for parcels with no structures.
- A tax bill mailed far from Mount Vernon usually means an absentee owner, so note the mailing address on each record.
- Measure the road frontage on the map; a sliver of frontage on a road outside Mount Vernon may not be enough for a driveway permit.
- Pull up three or four similar parcels near Mount Vernon and compare their land values.
- For a tract near Mount Vernon, confirm zoning, septic suitability and flood status before you make an offer.
Before you buy near Mount Vernon, read how to tell if land is buildable.
How accurate are Posey County, IN property lines?
On rural tracts near Mount Vernon, the parcel lines can drift from the fences on the ground, sometimes by more than a few feet. Square-ish tracts around Mount Vernon are no accident: Indiana land was surveyed into sections, and deeds still describe land that way. A survey is the only document that settles where a Posey County boundary actually runs.
A note on timing and acreage
If a tract near Mount Vernon changed hands recently, the recorded deed is more current than the map. Treat Posey County acreage figures as estimates until a survey confirms them.
Frequently asked questions
Does Posey County have a plat book?
Whether a current printed edition exists for Posey County varies; the free online map covering Mount Vernon and the rest of the county is the dependable option.
Does the Posey County parcel map show where I can hunt?
The map tells you who owns the woods near Mount Vernon; the owner decides whether you can hunt there.
Does the Posey County, IN map show flood zones?
Look in the layer list of the Posey County WTH GIS map. If there's no flood layer, FEMA's flood map service covers Posey County.
How accurate is the acreage on the Posey County, IN map?
It's good for comparing tracts around Mount Vernon, but don't pay by the acre based on it alone.
How can I tell who owns land near Mount Vernon?
For land near Mount Vernon with no street address, pan to it on the map and click it; the record names the owner.
Where do property lines run on a Posey County, IN lot?
Map first, then the recorded plat or deed, then a survey: that order works for any boundary question in Posey County.
Open the official Posey County, IN parcel map Posey 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.