Tennessee · FIPS 47173 · County seat: Maynardville
Union County, TN GIS & Parcel Viewer
Use this page to reach the official statewide parcel map for Union County, Tennessee. The button below opens Tennessee Property Viewer (TN Comptroller) in a new tab, so you can look up parcels by address, owner or parcel number on the source site itself.
Open the Union County statewide map ↗
Opens tnmap.tn.gov in a new tab. We link out and never embed or copy parcel data.
Map and county facts
| Official map | Tennessee Property Viewer (TN Comptroller) |
|---|---|
| Type | Statewide map (covers all of Tennessee) |
| Website | tnmap.tn.gov |
| Access | Free, no login (checked Oct 2026) |
| County seat | Maynardville |
| Population | 20,741 (2023 Census Bureau estimate) |
| Land area | 224 sq mi |
| FIPS code | 47173 |
Where the parcel data comes from
This is a statewide map, not a county site. Tennessee Property Viewer (TN Comptroller) covers parcels across Tennessee, and Union County is one part of it. A statewide layer can trail the county's own books by weeks or months, so treat it as a fast first look rather than the final word. When we tested the link in October 2026 it opened with no login and no fee.
How to use the Union County viewer
- Open the statewide map with the button above.
- Search for an address in Union County, or zoom to the county on the map.
- Click a parcel to see the attributes the state layer includes.
- Write down the parcel number and use it for records searches with the Union County assessor or recorder.
If an address search comes up empty, try the parcel number from a tax bill or deed instead, or click the lot on the map.
Union County by the numbers
Census Bureau figures put Union County at about 20,741 people (2023 estimate) on roughly 224 square miles of land, which is about 93 residents per square mile. Among Tennessee's 95 counties, it is the 66th largest by population. Census maps also count about 24 square miles of water inside its boundary. Its county seat is Maynardville.
Nearby parcel maps
Parcels close to the edge of Union County can fall in the next county over. Neighboring counties:
A note on accuracy
Treat the map as a guide, not a boundary survey: parcel outlines are often shifted a bit from the real corners. A licensed surveyor settles exact lines.