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Union County, TN
3 cities and towns and 3 ZIP codes in Union County, Tennessee.
Population
20,431
Land area
224sq mi
People per sq mi
91
ZIP codes
3
Cities and towns in Union County
Union County at a glance
- Union County is 47% less dense than Tennessee as a whole.
- The median household income is $62,727, 10% below the Tennessee median of $69,595.
- A typical owner-occupied home is valued at $204,000 (29% below Tennessee) and median rent is $847 a month.
- Its largest cities are Maynardville (2,528), Plainview (2,458) and Luttrell (1,158).
Local data for Union County, TN
Counts from official public data
Housing and community stats
Union County, TN, American Community Survey 2020-2024
Median household income
$62,727
Poverty rate
13.8%
Median home value
$204,000
Prices +7.0% in a year
Median rent
$847/mo
Homeownership
80.2%
Bachelor's or higher
14.2%
Median age
42.7
Average commute
34.6 min
Largest reported origins and ancestries: Irish Americans (2,086), German Americans (1,587), Scottish Americans (384).
Economy and federal money
Jobs, income, federal spending and pandemic loans
Unemployment rate
3.6%
Aug 2026, 0.0 pts in a year
Average annual pay
$48,262
2,688 jobs, 2025
Income per person
$45,355
BEA, 2024
Federal spending
$132M
FY 2026, $6,644 per person
PPP loans
$5.8M
192 loans, 707 jobs reported
Campaign donations
$65.6K
Itemized, 2026 cycle
How people get to work
Union County, TN, workers 16 and older. American Community Survey 5-year estimates
- Drove alone74.1%
- Carpooled9.7%
- Public transit1.4%
- Walked2.9%
- Bicycle0.0%
- Taxi, ride-hailing, motorcycle or other0.4%
- Worked from home11.5%
Average one-way commute: 34.6 minutes for people who do not work from home.
Environment and hazard risk
Union County, TN, from FEMA, NOAA and EPA
Natural hazard risk
Very Low
Top: landslide
Storm events since 1996
247
Most often thunderstorm wind
Flood insurance policies
10
0.1% of homes, county
July high / Jan low
85° / 25°F
57.7 inches of rain a year
Hazards, floods and storm historyCheck a flood zone3 historic places
Health statistics
Share of adults in Union County, TN, CDC PLACES estimates
Obesity
40.3%
U.S. 33.3% +7.0 pts
Diabetes
14.6%
U.S. 12.1% +2.5 pts
Smoking
21.3%
U.S. 12.8% +8.5 pts
Uninsured (18-64)
12.5%
U.S. 11.1% +1.4 pts
Cities, towns and ZIP codes in Union County
Population shown
Frequently asked questions
- What is the largest city in Union County, TN?
- Maynardville is the largest city or town in Union County, with about 2,528 residents.
- How many ZIP codes are in Union County?
- Union County includes 3 ZIP Code Tabulation Areas, including 37779, 37807, 37866.
- What is the population of Union County, TN?
- About 20,431 people live in Union County, based on American Community Survey 5-year estimates.
- What counties border Union County?
- Union County borders Knox County, Anderson County, Campbell County, Claiborne County, Grainger County.
Source: U.S. Census Bureau (TIGER/Line boundaries, American Community Survey) · Data as of 12/31/2023