Blog · October 14, 2026 · Tennessee
Using the Union City GIS Map
Parcel data for Union City comes from the county, and the viewer is free.
Main page: Obion County, TN GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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For a parcel in or near Union City, the Union City GIS map shows the outline, the owner of record and a parcel ID. Covered here for Union City: where that map lives, the fastest ways to search, and what to double-check with records.
Opening the Union City GIS map
Parcel maps here are usually run by the county, not the town, which makes the Tennessee Property Viewer the main source for lots around Hornbeak.
Opening the official parcel viewer
Go first to the Tennessee Property Viewer; it maps every tax parcel from Rives to Troy. If you only know roughly where the land is, pan along US Route 45W and click the parcel itself. For a parcel near Rives, save the parcel ID before closing the panel; every records desk in the county asks for it first.
City limits and county records
Union City lies within Obion County, Tennessee, so its parcels are on the county's map. As the county seat, Union City hosts the courthouse, which puts the Register of Deeds close by. Out toward Troy, City or town hall handles things like zoning, permits and utilities for lots inside the boundary, and the county still keeps the parcel and deed records. Land beyond the town limits toward Rives generally falls under county rules instead.
On site with the map
The parcel map usually runs in a mobile browser, handy when you're parked on a road near Hornbeak, but coverage can be spotty out of town. A screenshot of the parcel near Hornbeak with its ID is a good backup.
Troubleshooting the viewer
When the map won't open around Rives, try a desktop browser or clear the cache; links occasionally change, and our directory page keeps the current one.
Printing and saving
Print or screenshot the parcel near Woodland Mills with its ID visible, which helps later when you ask the assessor or a title company.
What the map can't tell you
Acreage on the record is an estimate; just a licensed surveyor can set the real boundary for a parcel near Rives. For acreage around Rives, owner names and values update on a schedule, so a deed recorded last month might lag behind.
Land on the county line
Obion County touches Fulton County, KY, Hickman County, KY, Dyer County, Gibson County, and Lake County, and each of those keeps its own parcel map. Acreage along the edge near Obion may show up across two assessors' files, so open the adjacent map as well. For land near Troy, the Platbookmapper state page links each neighboring county map for Tennessee.
Finding the right lot
Acreage around Rives might not have a street number, so zoom in from US Route 45W and click the outline. If the land is near South Fulton, searching by parcel number never misses, and you'll find it on tax statements.
Getting answers from the right desk
Deeds, mortgages and recorded plats for land near South Fulton come from the Register of Deeds, often with an online index. Questions about what you can build around South Fulton need the planning or permitting office, town or county, depending on location.
Layers worth turning on
Near South Fulton, layer lists often include municipal boundaries, floodplain and sometimes zoning; availability varies.
Getting your bearings
Union City is the county seat, which is where the courthouse records live. Other places on the map include Woodland Mills, Rives, Troy, and South Fulton. About 30,411 people live in Obion County (Census estimate, 2023) across some 545 square miles. Obion County was organized in 1824, so old deeds can run back a long way. Features like Reelfoot National Wildlife Refuge help you orient on the aerial around Woodland Mills.
Recorded documents worth pulling
When the details count, pull the recorded deed through the Register of Deeds; the parcel map near Troy only summarizes it. For a home near Hornbeak, have ready the book and page listed on the parcel record and the lookup takes minutes.
Owner, value and acreage
Recent sales on nearby lots around Woodland Mills give a rough idea of values; they're not an appraisal.
Reading the legal description
Rural deeds near Rives commonly use metes-and-bounds descriptions, which trace the boundary call by call. Town lots near Hornbeak refer to a recorded plat, which is simpler to follow. Write down the legal description for the tract near Rives for any title or survey request.
Frequently asked
Is the Union City GIS map free?
It depends, but the Tennessee Property Viewer is free and opens without a login; some sites ask you to accept a disclaimer.
How often is the parcel map updated around South Fulton?
For a parcel near Woodland Mills, updates come in batches.
Is there a separate city GIS for Union City?
Good question; Union City may publish zoning or utility maps separately, while parcel data usually comes from the county.
Are parcel lines on the map exact near Obion?
For most people, the map near Obion isn't a survey; get a survey before a fence.
What's the tax parcel number used for around Rives?
The parcel ID identifies one tax parcel near Troy, and it's on the record panel and tax bills.
Open the official Obion County, TN 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.