Union County land: flood and parcels
14,737 parcels
On the county tax roll
- Acres on the roll142,544
- In a FEMA flood zone11%special flood hazard area
Free account: 25 parcel cards a day on the map, with sale history, road access and elevation. Get started free
No zoning layer for Union County yet. Zoning here is set town by town.
Around Union County
Parcels to start with
Towns in Union County
- Maynardville1,236 parcels
- Plainview984 parcels
- Luttrell565 parcels
Flood zones and wetlands
Recorded flood claims in Union County
10 insured flood claims were recorded in Union County from 1978 to Sep 2026; fewer than 10 were on buildings rated outside the mapped flood zone (zone X, B or C). FEMA paid $203,000 on them in total.
| Years | Claims |
|---|---|
| 1978–79 | Fewer than 10 |
| 1980–89 | Fewer than 10 |
| 1990–99 | Fewer than 10 |
| 2000–09 | Fewer than 10 |
| 2010–19 | Fewer than 10 |
| 2020–26 | Fewer than 10 |
Area statistics for buildings with NFIP flood insurance, not any one parcel: a lot that never had an insured building has no claims to count. OpenFEMA NFIP Redacted Claims v3, as of Sep 2026.
This product uses the Federal Emergency Management Agency's OpenFEMA API, but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data.
Farmland rent in Union County
Cropland in Union County rents for about $25 an acre a year (USDA, 2026).
- Cropland rent
- $25 an acrenon-irrigated, 2026; $29 in 2022
- Pasture rent
- $12 an acre2026; $10 in 2022
No rent-to-price figure for Tennessee yet.
Rent: USDA NASS county cash rents survey, 2026 (released August 21, 2026), public domain. Farmland rent in every Tennessee county →
People and new homes in Union County
- Population21,450July 2025 estimate, +8.1% since 2020
- Median household income$62,7272020–2024 average, ±$3,883
- New homes permitted1542025, 154 single-family; 123 in 2021
- Permitted so far in 202682Jan–Aug, against 83 a year earlier
U.S. Census Bureau, Population Estimates Program, Vintage 2025 (May 2026); U.S. Census Bureau, American Community Survey 2020-2024 5-year (B19013) (Jan 2026); U.S. Census Bureau, Building Permits Survey (Sep 2026).
Land in Union County by useLand use on the county roll
| Land class | Parcels | Share |
|---|---|---|
| Building on record | 8,149 | 55% |
| Other or not coded | 4,237 | 29% |
| Farm and timber | 1,729 | 12% |
| Institutional | 622 | 4.2% |
1,729 farm and timber parcels cover 77,393 acres. County tax roll 2026 (pulled Oct 2026); land class read from the roll's land-use and building fields.
Typical lot sizeThe typical lot, from the roll
The median parcel in Union County is 1.16 acres (14,737 parcels with a size).
Acres from the county roll, or from the parcel's own outline where the roll's figure is off by more than three times. Condominium units that share one point (each carrying the whole complex's acres) are left out of the lot sizes.
Land parcels in Union CountyFarm and timber parcels to start with
- 3003 Sharps Chapel Rd 29.0 acres
- 27.8 acres of farm and timber land
- 330 Dark Hollow Rd N 27.2 acres
- 465 Bull Run Rd 26.8 acres
- 22.9 acres of farm and timber land
- 321 Keck Rd 22.8 acres
- 22.2 acres of farm and timber land
- 531 Bower Hollow Rd 22.0 acres
- 371 Monroe Rd 21.3 acres
Farm and timber parcels of an acre or more, each with its own page of public roll facts.
Questions about Union County landAnswers from the public records
How many parcels are in Union County, TN?
14,737 parcels on the 2026 Union County tax roll (pulled Oct 2026), covering 142,544 acres.
How much vacant land is in Union County, TN?
Union County's vacant-land class has not been through our aerial check yet, so we don't call any parcel here vacant land.
What is the typical lot size in Union County?
The median parcel is 1.16 acres, from 14,737 parcels with a recorded size.
How much of Union County is in a flood zone?
11% of parcels are in a FEMA special flood hazard area (National Flood Hazard Layer, as of Sep 2026). Check each parcel's own flood line before you buy.
Are there wetlands in Union County?
0.5% of parcels are a quarter or more wetland on the USFWS National Wetlands Inventory, a mapping guide, not a legal delineation.
Are there land prices for Union County?
No land prices for Union County yet. Area prices print only where Tennessee's own price test passed for the county, and it has not for Union County.
How many people live in Union County?
About 21,450 (Census estimate for July 1, 2025), +8.1% since 2020.
How many new homes are being built in Union County?
Building permits authorized 154 new housing units in 2025 and 82 from January to Aug 2026 (against 83 a year earlier) (Census Building Permits Survey).
Where does this data come from?
Parcels: County assessor and GIS parcel files (Davidson, Hamilton, Williamson, Wilson, Robertson). Flood: FEMA National Flood Hazard Layer. Wetlands: USFWS National Wetlands Inventory. Towns: U.S. Census places. Every figure is counted from those files on our map.
About these numbersSources, dates and how these figures are built
What Groundwork can price in Union County
Facts only: no price estimate on any parcel here.
Sources
Parcels: County assessor and GIS parcel files (Davidson, Hamilton, Williamson, Wilson, Robertson) (2026 roll, pulled Oct 2026); flood: FEMA National Flood Hazard Layer (as of Sep 2026); wetlands: USFWS National Wetlands Inventory (as of Oct 2026); sales: the county's own file, through Sep 2026; counted on our map built Oct 2026.