Decatur, IN Demographics

A map of Decatur's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	8,560	8,529	87.2%	86.0%
Hispanic	950	864	9.7%	8.7%
Multiracial	209	283	2.1%	2.9%
Black	68	135	0.7%	1.4%
Native American/Other	22	45	0.2%	0.5%
Asian	2	57	0.0%	0.6%

Decatur, Indiana has an estimated population of 9,811, a slight decrease from the 9,913 recorded in the 2020 Census. The population is 87.2% White, 9.7% Hispanic, 2.1% Multiracial, 0.7% Black, 0.2% Native American/Other, and 0.0% Asian. 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 has become less racially diverse since the 2020 Census. It is considerably less diverse than Indiana 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 25.1% in 2020 and 22.9% in the most recent ACS estimates.

Decatur is ranked the 89th most populous place in Indiana, out of 976 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 83rd most populous place in the 2020 Census.

Decatur's White Population

8,560 residents of Decatur, or 87.2% of the population, identify as White. The share of White residents in Decatur is considerably higher than in Indiana overall, where 75.4% of the population is White. Decatur ranks 556th statewide in terms of White residents as a share of the population, out of 976 places.

Since the 2020 Census, Decatur's White population has remained roughly the same. White residents' share of Decatur's population has increased from 86.0% to 87.2%.

Decatur is more White than neighboring Wren (78.2% White). Decatur is less White than neighboring Monroe (87.4% White), Hoagland (97.2% White), Monroeville (89.7% White), and Willshire (92.3% White).

Decatur's Black Population

68 residents of Decatur, or 0.7% of the population, identify as Black. The share of Black residents in Decatur is lower than in Indiana overall, where 9.1% of the population is Black. Decatur ranks 156th statewide in terms of Black residents as a share of the population, out of 976 places.

Since the 2020 Census, Decatur's Black population has declined by an estimated 49.6%. Black residents' share of Decatur's population has decreased from 1.4% to 0.7%.

Decatur is more Black than neighboring Monroe (0% Black), Hoagland (0% Black), Wren (0% Black), Monroeville (0% Black), and Willshire (0.3% Black).

Decatur's Asian Population

2 residents of Decatur, or 0.0% of the population, identify as Asian. The share of Asian residents in Decatur is slightly lower than in Indiana overall, where 2.6% of the population is Asian. Decatur ranks 240th statewide in terms of Asian residents as a share of the population, out of 976 places.

Since the 2020 Census, Decatur's Asian population has declined by an estimated 96.5%. Asian residents' share of Decatur's population has decreased from 0.6% to 0.0%.

Decatur is less Asian than neighboring Monroeville (0.4% Asian), and Willshire (0.5% Asian).

Decatur's Hispanic Population

950 residents of Decatur, or 9.7% of the population, identify as Hispanic. The share of Hispanic residents in Decatur is comparable to the share in Indiana overall, where 8.6% of the population is Hispanic. Decatur ranks 87th statewide in terms of Hispanic residents as a share of the population, out of 976 places.

Since the 2020 Census, Decatur's Hispanic population has grown by an estimated 10.0%. Hispanic residents' share of Decatur's population has increased from 8.7% to 9.7%.

Decatur is more Hispanic than neighboring Hoagland (0% Hispanic), Monroeville (7.6% Hispanic), and Willshire (5.4% Hispanic). Decatur is less Hispanic than neighboring Monroe (10.2% Hispanic), and Wren (15% Hispanic).

Decatur's Native American/Other Population

22 residents of Decatur, or 0.2% 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 Indiana overall, where 0.5% of the population is Native American/Other. Decatur ranks 320th statewide in terms of Native American/Other residents as a share of the population, out of 976 places.

Since the 2020 Census, Decatur's Native American/Other population has declined by an estimated 51.1%. Native American/Other residents' share of Decatur's population has remained roughly unchanged at 0.2%.

Decatur is more Native American/Other than neighboring Monroeville (0.1% Native American/Other), and Willshire (0% Native American/Other). Decatur is less Native American/Other than neighboring Monroe (0.6% Native American/Other), Hoagland (0.9% Native American/Other), and Wren (3.4% Native American/Other).

Decatur's Multiracial Population

209 residents of Decatur, or 2.1% of the population, identify as Multiracial. The share of Multiracial residents in Decatur is comparable to the share in Indiana overall, where 3.8% of the population is Multiracial. Decatur ranks 466th statewide in terms of Multiracial residents as a share of the population, out of 976 places.

Since the 2020 Census, Decatur's Multiracial population has declined by an estimated 26.1%. Multiracial residents' share of Decatur's population has decreased from 2.9% to 2.1%.

Decatur is more Multiracial than neighboring Monroe (1.8% Multiracial), Hoagland (1.9% Multiracial), and Willshire (1.5% Multiracial). Decatur is less Multiracial than neighboring Wren (3.4% Multiracial), and Monroeville (2.3% 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.