Union County Demographics

A map of Union County's Population by Race

Union County, Tennessee has an estimated population of 20,431, an increase from the 19,802 recorded in the 2020 Census. The population is 94.0% White, 3.1% Multiracial, 2.4% Hispanic, 0.3% Black, 0.1% Asian, and 0.1% Native American/Other. This demographic dot map shows the population of Union County, with one dot drawn for each person counted by the Census, color-coded by race.

Union is about as racially diverse as it was in the 2020 Census. It is considerably less diverse than Tennessee overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In Union County, that probability was 11.2% in 2020 and 11.4% in the most recent ACS estimates.

Union County is ranked the 66th most populous county in Tennessee, out of 95 counties. Union County was ranked the 67th most populous county in the 2020 Census.

Union County's White Population

19,213 residents of Union County, or 94.0% of the population, identify as White. The share of White residents in Union County is significantly higher than in Tennessee overall, where 71% of the population is White. Union County ranks 9th statewide in terms of White residents as a share of the population, out of 95 counties.

Since the 2020 Census, Union County's White population has grown by an estimated 3.1%. White residents' share of Union County's population has remained roughly unchanged at 94.0%.

Union County is more White than neighboring Knox County (79.1% White), Grainger County (93.3% White), and Anderson County (86.4% White). Union County is less White than neighboring Campbell County (95.7% White).

Union County's Black Population

70 residents of Union County, or 0.3% of the population, identify as Black. The share of Black residents in Union County is significantly lower than in Tennessee overall, where 15.4% of the population is Black. Union County ranks 90th statewide in terms of Black residents as a share of the population, out of 95 counties.

Since the 2020 Census, Union County's Black population has grown by an estimated 32.1%. Black residents' share of Union County's population has remained roughly unchanged at 0.3%.

Union County is less Black than neighboring Claiborne County (0.6% Black), Knox County (8% Black), Grainger County (1.1% Black), Campbell County (0.5% Black), and Anderson County (3.3% Black).

Union County's Asian Population

11 residents of Union County, or 0.1% of the population, identify as Asian. The share of Asian residents in Union County is comparable to the share in Tennessee overall, where 1.9% of the population is Asian. Union County ranks 84th statewide in terms of Asian residents as a share of the population, out of 95 counties.

Since the 2020 Census, Union County's Asian population has declined by an estimated 69.4%. Asian residents' share of Union County's population has remained roughly unchanged at 0.1%.

Union County is less Asian than neighboring Claiborne County (0.6% Asian), Knox County (2.3% Asian), Grainger County (0.2% Asian), Campbell County (0.2% Asian), and Anderson County (1.4% Asian).

Union County's Hispanic Population

485 residents of Union County, or 2.4% of the population, identify as Hispanic. The share of Hispanic residents in Union County is slightly lower than in Tennessee overall, where 7.4% of the population is Hispanic. Union County ranks 76th statewide in terms of Hispanic residents as a share of the population, out of 95 counties.

Since the 2020 Census, Union County's Hispanic population has grown by an estimated 20.0%. Hispanic residents' share of Union County's population has remained roughly unchanged at 2.4%.

Union County is more Hispanic than neighboring Claiborne County (1.7% Hispanic), and Campbell County (1.6% Hispanic). Union County is less Hispanic than neighboring Knox County (6.3% Hispanic), Grainger County (3.6% Hispanic), and Anderson County (4.1% Hispanic).

Union County's Native American/Other Population

20 residents of Union County, or 0.1% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Union County is comparable to the share in Tennessee overall, where 0.6% of the population is Native American/Other. Union County ranks 82nd statewide in terms of Native American/Other residents as a share of the population, out of 95 counties.

Since the 2020 Census, Union County's Native American/Other population has declined by an estimated 74.7%. Native American/Other residents' share of Union County's population has remained roughly unchanged at 0.1%.

Union County is less Native American/Other than neighboring Claiborne County (0.2% Native American/Other), Knox County (0.6% Native American/Other), Grainger County (0.8% Native American/Other), and Anderson County (0.8% Native American/Other).

Union County's Multiracial Population

632 residents of Union County, or 3.1% of the population, identify as Multiracial. The share of Multiracial residents in Union County is comparable to the share in Tennessee overall, where 3.7% of the population is Multiracial. Union County ranks 79th statewide in terms of Multiracial residents as a share of the population, out of 95 counties.

Since the 2020 Census, Union County's Multiracial population has grown by an estimated 7.5%. Multiracial residents' share of Union County's population has remained roughly unchanged at 3.1%.

Union County is more Multiracial than neighboring Claiborne County (2.9% Multiracial), Grainger County (1.1% Multiracial), and Campbell County (2% Multiracial). Union County is less Multiracial than neighboring Knox County (3.7% Multiracial), and Anderson County (4% Multiracial).

Sources: Most recent population estimates are from the 2020-2024 American Community Survey 5-Year Estimates. 2020 population counts and map data are from 2020 Census State Redistricting Data. Geographic data are from Census TIGER/Line Shapefiles.