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Where am ILOCATED

Union County, Tennessee

Union County, Tennessee, has 21,450 residents (July 2025 estimate). Its county seat is Maynardville. It uses Eastern Time and covers 224 sq mi (579 km²) of land.

Nashville-DavidsonMemphisKnoxville
Union County in Tennessee
MaynardvillePlainviewLuttrell
Union County and its neighbors (simplified outlines). Open in OpenStreetMap ↗
Resident population, July 2025
21,450
Land area
224 sq mi (579 km²)
County seat or government
Maynardville
Time zone
Eastern TimeUTC-05:00 in January; UTC-04:00 in July
Median household income
$62,727 ± $3,883
Median home value
$204,000 ± $15,444
Median rent, with utilities
$847 ± $49
Homes lived in by their owners
80.2% ± 3.3 points
County type
County
Metro or micro area
Knoxville, TN metro areaOutlying county
Water area
23.6 sq mi (61 km²)
State
Tennessee
County code (FIPS)
47173
Coordinates (central point)
36.284140, -83.836088
Open this point in the location finder

These coordinates mark a central point for the area, not a street address. Income, home value, rent and homes lived in by their owners: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, ± margin at 90% confidence; checked on October 13, 2026.

Time zones in Union County

Time zoneLocal time and UTC offsetNext clock change
Eastern TimeAmerica/New_YorkUTC-05:00 in January; UTC-04:00 in July. Enable JavaScript for the live clock.Enable JavaScript for upcoming changes.

Near a time-zone line, check where you are with the time-zone finder. Your phone’s setting can differ.

ZIP Code areas, largest first

  1. 3793817,437 people
  2. 3772114,306 people
  3. 3780711,069 people
  4. 378258,409 people
  5. 377055,239 people
  6. 378704,385 people
  7. 377544,211 people
  8. 377793,649 people
  9. 378883,432 people
  10. 378662,468 people
  11. 37848145 people

11 ZIP Code areas overlap Union County. People counts are 2020–2024 estimates for each whole ZIP area. Mailing ZIPs can differ; check an address with USPS ZIP Code Lookup.

Official county information

We don’t have a website for this county yet. The US government’s local-office directory ↗ lists its offices. A geographic lookup cannot determine eligibility, tax liability or a court obligation.

School districts in Union County, largest first

  1. Union County School District20,431 people

Districts with land in the county; a district can cross county lines. People counts are American Community Survey 2020–2024 5-year estimates. A district boundary doesn’t decide which school a student attends.

Cities, towns and communities, largest first

These areas overlap the mapped boundary; an overlap does not mean that every address belongs to both.

  1. Maynardville, Tennessee (city)2,528 people
  2. Plainview, Tennessee (city)2,458 people
  3. Luttrell, Tennessee (town)1,158 people

Bordering areas, nearest first

Distances are straight lines between map points.

  1. Claiborne County, Tennessee18 mi northeast
  2. Grainger County, Tennessee18 mi east
  3. Campbell County, Tennessee20 mi northwest
  4. Knox County, Tennessee21 mi south
  5. Anderson County, Tennessee23 mi southwest

Before using this answer on a form

Use a precise point for address-level questions. A device accuracy circle can cross a boundary; confirm tax, voting or jury details with the responsible office.

Find the county where you are now, check its ZIP area, or check the time zone where you are.

See this county on Census.gov ↗

Areas that only touch the edge

These areas meet the boundary only along a sliver. Most addresses here are not in them; for an address near the line, check with the county.