Decatur County Demographics

A map of Decatur County's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	10,428	10,462	90.1%	91.5%
Hispanic	429	358	3.7%	3.1%
Black	315	270	2.7%	2.4%
Multiracial	217	274	1.9%	2.4%
Asian	161	42	1.4%	0.4%
Native American/Other	29	29	0.3%	0.3%

Decatur County, Tennessee has an estimated population of 11,579, a slight increase from the 11,435 recorded in the 2020 Census. The population is 90.1% White, 3.7% Hispanic, 2.7% Black, 1.9% Multiracial, 1.4% Asian, and 0.3% Native American/Other. This demographic dot map shows the population of Decatur County, with one dot drawn for each person counted by the Census, color-coded by race.

Decatur has become more racially diverse since 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 Decatur County, that probability was 16.1% in 2020 and 18.6% in the most recent ACS estimates.

Decatur County is ranked the 87th most populous county in Tennessee, out of 95 counties. Decatur County was ranked the 87th most populous county in the 2020 Census.

Decatur County's White Population

10,428 residents of Decatur County, or 90.1% of the population, identify as White. The share of White residents in Decatur County is significantly higher than in Tennessee overall, where 71% of the population is White. Decatur County ranks 21st statewide in terms of White residents as a share of the population, out of 95 counties.

Since the 2020 Census, Decatur County's White population has remained roughly the same. White residents' share of Decatur County's population has decreased from 91.5% to 90.1%.

Decatur County is more White than neighboring Perry County (89% White), Henderson County (85.8% White), Benton County (89.7% White), and Wayne County (88.5% White). Decatur County is less White than neighboring Hardin County (90.8% White).

Decatur County's Black Population

315 residents of Decatur County, or 2.7% of the population, identify as Black. The share of Black residents in Decatur County is considerably lower than in Tennessee overall, where 15.4% of the population is Black. Decatur County ranks 55th statewide in terms of Black residents as a share of the population, out of 95 counties.

Since the 2020 Census, Decatur County's Black population has grown by an estimated 16.7%. Black residents' share of Decatur County's population has remained roughly unchanged at 2.7%.

Decatur County is more Black than neighboring Perry County (0.3% Black), and Benton County (1.5% Black). Decatur County is less Black than neighboring Henderson County (7.9% Black), Hardin County (3.4% Black), and Wayne County (4.3% Black).

Decatur County's Asian Population

161 residents of Decatur County, or 1.4% of the population, identify as Asian. The share of Asian residents in Decatur County is comparable to the share in Tennessee overall, where 1.9% of the population is Asian. Decatur County ranks 62nd statewide in terms of Asian residents as a share of the population, out of 95 counties.

Since the 2020 Census, Decatur County's Asian population has grown by an estimated 283.3%. Asian residents' share of Decatur County's population has increased from 0.4% to 1.4%.

Decatur County is more Asian than neighboring Perry County (0.2% Asian), Henderson County (0.2% Asian), Hardin County (0% Asian), Benton County (1% Asian), and Wayne County (0% Asian).

Decatur County's Hispanic Population

429 residents of Decatur County, or 3.7% of the population, identify as Hispanic. The share of Hispanic residents in Decatur County is slightly lower than in Tennessee overall, where 7.4% of the population is Hispanic. Decatur County ranks 46th statewide in terms of Hispanic residents as a share of the population, out of 95 counties.

Since the 2020 Census, Decatur County's Hispanic population has grown by an estimated 19.8%. Hispanic residents' share of Decatur County's population has increased from 3.1% to 3.7%.

Decatur County is more Hispanic than neighboring Perry County (1.4% Hispanic), Henderson County (3% Hispanic), Hardin County (2.5% Hispanic), Benton County (2.8% Hispanic), and Wayne County (2.7% Hispanic).

Decatur County's Native American/Other Population

29 residents of Decatur County, or 0.3% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Decatur County is comparable to the share in Tennessee overall, where 0.6% of the population is Native American/Other. Decatur County ranks 91st statewide in terms of Native American/Other residents as a share of the population, out of 95 counties.

Since the 2020 Census, Decatur County's Native American/Other population has remained roughly the same. Native American/Other residents' share of Decatur County's population has remained roughly unchanged at 0.3%.

Decatur County is more Native American/Other than neighboring Henderson County (0.2% Native American/Other), and Hardin County (0.2% Native American/Other). Decatur County is less Native American/Other than neighboring Perry County (1.4% Native American/Other), Benton County (0.6% Native American/Other), and Wayne County (0.4% Native American/Other).

Decatur County's Multiracial Population

217 residents of Decatur County, or 1.9% of the population, identify as Multiracial. The share of Multiracial residents in Decatur County is comparable to the share in Tennessee overall, where 3.7% of the population is Multiracial. Decatur County ranks 90th statewide in terms of Multiracial residents as a share of the population, out of 95 counties.

Since the 2020 Census, Decatur County's Multiracial population has declined by an estimated 20.8%. Multiracial residents' share of Decatur County's population has decreased from 2.4% to 1.9%.

Decatur County is less Multiracial than neighboring Perry County (7.7% Multiracial), Henderson County (3% Multiracial), Hardin County (3% Multiracial), Benton County (4.4% Multiracial), and Wayne County (4.1% 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.