• county
  • FIPS 47173
  • Largest town: Maynardville

Union County, Tennessee

Union County had 21,064 residents in the Census Vintage 2024 estimate, on 223.6 square miles of land. It ranks 66th of 95 in Tennessee by population and 86th by land area.

Population
21,064
#66 of 95 in Tennessee · #1,766 in US
Area
223.6 sq mi
#86 of 95 in Tennessee · #2,962 in US
Density
94 / sq mi
#39 of 95 in Tennessee · #957 in US
Median household income
$64,244
#24 of 95 in Tennessee · #1,434 in US

Census Vintage 2024 estimates · SAIPE 2023 income · 2024 Gazetteer land area

Union County within Tennessee. Pin: Nashville.

Measure from here

Tools and pages that start from Union County

Union County population, land area and income

Union County had 21,064 residents in the Census Vintage 2024 estimate, on 223.6 square miles of land. It ranks 66th of 95 in Tennessee by population and 86th by land area. That works out to 94.2 people per square mile, near the US average of 96.3, and above the national county median.

The median county-equivalent in Tennessee has 32,883 residents; Union County is somewhat smaller.

Its SAIPE 2023 median household income of $64,244 is above the national county median among 3,143 counties with an estimate.

National rank among 3,144

Population

21,064

3144th1st

1766th of 3,144 (US)

Land area

224 sq mi

3144th1st

2962nd of 3,144 (US)

Density

94.2 / sq mi

3144th1st

957th of 3,144 (US)

Median household income

$64,244

3143rd1st

1434th of 3,143 (US)

Rank within Tennessee (95)

Population

21,064

95th1st

66th of 95 (TN)

Land area

224 sq mi

95th1st

86th of 95 (TN)

Density

94.2 / sq mi

95th1st

39th of 95 (TN)

Median household income

$64,244

95th1st

24th of 95 (TN)

How Union County's population changed since 2020

Union County gained 1,219 residents between the July 2020 and July 2024 estimates, a rise of 6.1%. That ranks 27th of 95 in Tennessee for growth. The median Tennessee county changed by +4.4%, and the state as a whole by +4.3%.

Since the April 2020 estimates base, Union County recorded 826 births and 1,316 deaths, a natural change of -490. Net international migration added -6 and net domestic migration, people moving to or from other US counties, came to +1,732. The largest single component was domestic migration, which added 1,732 people.

19.8k202020.0k202120.5k202220.7k202321.1k2024
Census Vintage 2024 county estimates for July 1 of each year. The axis starts above zero so year-to-year changes are visible.

Components of change, April 2020 to July 2024

Births
826
Deaths
1,316
Net international migration
-6
Net domestic migration
+1,732
Change, July 2023 to July 2024
+317

Where Union County is

The Census internal point of Union County is at 36.284100, -83.836100. It sits in UTM zone 17N. The map shades Tennessee's 95 county-equivalents by population change from 2020 to 2024, darker for faster growth, with Union County outlined. Dots are towns of 1,000+ people with residents in it.

Warren County: +6.2%Bledsoe County: +4.3%Cheatham County: +3.7%Crockett County: +0.5%Putnam County: +6.0%Houston County: +2.8%Macon County: +7.6%Sequatchie County: +11.2%Fayette County: +6.2%Trousdale County: +4.5%Union County: +6.1%Claiborne County: +3.1%Weakley County: +0.8%Coffee County: +5.4%Johnson County: +2.8%Overton County: +4.3%Lake County: -8.1%Moore County: +4.7%Hardeman County: -0.0%Jefferson County: +7.8%Smith County: +4.1%Robertson County: +7.5%Gibson County: +1.9%Henry County: +2.3%Grundy County: +4.4%Decatur County: +3.2%Greene County: +4.3%Hamblen County: +4.9%Humphreys County: +2.9%Knox County: +5.5%Roane County: +5.7%Lewis County: +6.4%Rhea County: +4.4%Rutherford County: +9.8%Montgomery County: +11.2%Lauderdale County: -2.0%Shelby County: -2.1%Tipton County: +1.9%Perry County: +7.2%Stewart County: +4.8%Chester County: +2.8%Washington County: +4.8%Polk County: +4.4%Van Buren County: +8.3%Dyer County: -0.8%Davidson County: +1.9%Cocke County: +4.3%Williamson County: +7.8%Benton County: +2.0%Dickson County: +5.9%Lawrence County: +5.2%Hamilton County: +5.0%McNairy County: +0.9%Meigs County: +8.8%Hawkins County: +4.7%Blount County: +4.8%White County: +6.1%Marshall County: +9.8%Sullivan County: +2.8%Campbell County: +2.4%Haywood County: -4.1%Bradley County: +4.5%Franklin County: +5.4%Sumner County: +7.2%Hardin County: +2.4%Grainger County: +6.4%Hickman County: +3.6%Pickett County: +2.2%Carroll County: +2.4%Henderson County: +1.3%Sevier County: +1.3%Hancock County: +6.2%Scott County: +2.9%McMinn County: +6.4%Morgan County: +4.3%Lincoln County: +4.0%Obion County: -1.7%Unicoi County: -0.0%Wayne County: -1.5%Cannon County: +4.0%Fentress County: +8.6%Loudon County: +12.7%Wilson County: +14.3%Bedford County: +7.6%Monroe County: +5.9%DeKalb County: +7.7%Marion County: +3.2%Carter County: +1.9%Clay County: +3.5%Madison County: +1.6%Cumberland County: +6.9%Anderson County: +5.3%Maury County: +11.4%Giles County: +2.1%Jackson County: +6.4%
Change 2020 to 2024
  1. < +1.9%
  2. < +3.7%
  3. < +4.9%
  4. < +6.4%
  5. ≥ +6.4%
no data

Orange pin: Union County internal point. Dark pin: Nashville.

Internal point

Decimal
36.284100, -83.836100
DMS
36°17'2.76"N 83°50'9.96"W
UTM
17N 245277.6E 4019192.6N
Geohash
dnkqkm26j
Plus code
868R75M7+JH

Towns in Union County

3 incorporated places of 1,000+ people have residents in Union County, 5,910 people together, or 28% of the county. Each figure counts only the part of the town inside Union County; towns marked "part" extend into another county. The largest is Maynardville with 2,598.

  1. 01Maynardville2,598
  2. 02Plainview2,226
  3. 03Luttrell1,086
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering Union County

The Census 2024 county adjacency file lists 5 neighbors for Union County. The most populous is Knox County, TN, with 506,748 residents. Distances run between Census internal points in a straight line.

Distance to Nashville and the nearest big city

Nashville is 164.5 miles W of Union County's internal point in a straight line. The nearest place of 100,000 or more is Knoxville, TN (population 198,722), 22.6 miles away. The nearest place of 10,000 or more is Clinton, TN (population 10,458), 20.8 miles away.

Union County FIPS code

The FIPS code of Union County is 47173: state code 47 for Tennessee plus county code 173. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $64,244.

Questions people ask

What is the population of Union County, Tennessee?

The Census Vintage 2024 estimate for July 1, 2024 is 21,064. That is up 1,219 people (6.1%) from the July 2020 estimate of 19,845.

What is the FIPS code of Union County?

47173. The first two digits (47) are Tennessee; the last three (173) identify the county.

What is the largest town in Union County?

Maynardville, with 2,598 residents inside Union County in 2024.

Which counties border Union County?

5 county-equivalents border it in the Census 2024 adjacency file: Knox County, TN; Anderson County, TN; Campbell County, TN; Claiborne County, TN; Grainger County, TN.

Sources and data as of

Data as of: Census Vintage 2024 population estimates, 2024 Gazetteer land area and internal points, SAIPE 2023 median household income.

  1. 01Census Vintage 2024 county population estimates
  2. 02Census 2024 Gazetteer, counties
  3. 03Census SAIPE 2023 state and county estimates
  4. 04Census Vintage 2024 subcounty population estimates
  5. 05Census 2024 county adjacency file
  6. 06Census 2024 cartographic boundary file, counties (1:5,000,000)

How every number is computed: methodology. Spotted a wrong figure? Report an error.