Decatur, TN Demographics

A map of Decatur's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	1,733	1,429	91.3%	91.4%
Multiracial	94	63	5.0%	4.0%
Black	53	30	2.8%	1.9%
Hispanic	18	20	0.9%	1.3%
Asian	0	4	0.0%	0.3%
Native American/Other	0	17	0.0%	1.1%

Decatur, Tennessee has an estimated population of 1,898, a large increase from the 1,563 recorded in the 2020 Census. The population is 91.3% White, 5.0% Multiracial, 2.8% Black, 0.9% Hispanic, 0.0% Asian, and 0.0% Native American/Other. This demographic dot map shows the population of Decatur, with one dot drawn for each person counted by the Census, color-coded by race.

Decatur 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 Decatur, that probability was 16.2% in 2020 and 16.3% in the most recent ACS estimates.

Decatur is ranked the 229th most populous place in Tennessee, out of 504 places. This ranking is based on the Census definition of a place, which includes incorporated places like cities, towns, and villages, as well as unincorporated census-designated places (CDPs). Decatur was ranked the 240th most populous place in the 2020 Census.

Decatur's White Population

1,733 residents of Decatur, or 91.3% of the population, identify as White. The share of White residents in Decatur is significantly higher than in Tennessee overall, where 71% of the population is White. Decatur ranks 169th statewide in terms of White residents as a share of the population, out of 504 places.

Since the 2020 Census, Decatur's White population has grown by an estimated 21.3%. White residents' share of Decatur's population has remained roughly unchanged at 91.3%.

Decatur is more White than neighboring Riceville (86.3% White), Athens (76.9% White), and Dayton (81.8% White). Decatur is less White than neighboring Spring City (93.6% White), and Calhoun (92.9% White).

Decatur's Black Population

53 residents of Decatur, or 2.8% of the population, identify as Black. The share of Black residents in Decatur is considerably lower than in Tennessee overall, where 15.4% of the population is Black. Decatur ranks 270th statewide in terms of Black residents as a share of the population, out of 504 places.

Since the 2020 Census, Decatur's Black population has grown by an estimated 76.7%. Black residents' share of Decatur's population has increased from 1.9% to 2.8%.

Decatur is more Black than neighboring Spring City (2.3% Black), and Calhoun (1.3% Black). Decatur is less Black than neighboring Riceville (6% Black), Athens (6.4% Black), and Dayton (3.1% Black).

Decatur's Asian Population

0 residents of Decatur, or 0.0% of the population, identify as Asian. The share of Asian residents in Decatur is comparable to the share in Tennessee overall, where 1.9% of the population is Asian. Decatur ranks 315th statewide in terms of Asian residents as a share of the population, out of 504 places.

Since the 2020 Census, Decatur's Asian population has declined by an estimated 100.0%. Asian residents' share of Decatur's population has remained roughly unchanged at 0.0%.

Decatur is less Asian than neighboring Athens (1.2% Asian), and Dayton (1% Asian).

Decatur's Hispanic Population

18 residents of Decatur, or 0.9% of the population, identify as Hispanic. The share of Hispanic residents in Decatur is lower than in Tennessee overall, where 7.4% of the population is Hispanic. Decatur ranks 428th statewide in terms of Hispanic residents as a share of the population, out of 504 places.

Since the 2020 Census, Decatur's Hispanic population has declined by an estimated 10.0%. Hispanic residents' share of Decatur's population has remained roughly unchanged at 0.9%.

Decatur is more Hispanic than neighboring Calhoun (0% Hispanic). Decatur is less Hispanic than neighboring Riceville (6.6% Hispanic), Spring City (1.1% Hispanic), Athens (7.7% Hispanic), and Dayton (12.2% Hispanic).

Decatur's Native American/Other Population

0 residents of Decatur, or 0.0% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Decatur is comparable to the share in Tennessee overall, where 0.6% of the population is Native American/Other. Decatur ranks 60th statewide in terms of Native American/Other residents as a share of the population, out of 504 places.

Since the 2020 Census, Decatur's Native American/Other population has declined by an estimated 100.0%. Native American/Other residents' share of Decatur's population has decreased from 1.1% to 0.0%.

Decatur is less Native American/Other than neighboring Riceville (1.2% Native American/Other), Spring City (0.4% Native American/Other), Athens (0.2% Native American/Other), and Dayton (0.4% Native American/Other).

Decatur's Multiracial Population

94 residents of Decatur, or 5.0% of the population, identify as Multiracial. The share of Multiracial residents in Decatur is comparable to the share in Tennessee overall, where 3.7% of the population is Multiracial. Decatur ranks 208th statewide in terms of Multiracial residents as a share of the population, out of 504 places.

Since the 2020 Census, Decatur's Multiracial population has grown by an estimated 49.2%. Multiracial residents' share of Decatur's population has increased from 4.0% to 5.0%.

Decatur is more Multiracial than neighboring Riceville (0% Multiracial), Spring City (2.5% Multiracial), and Dayton (1.6% Multiracial). Decatur is less Multiracial than neighboring Athens (7.6% Multiracial), and Calhoun (5.9% 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.