Decatur County Demographics

A map of Decatur County's Population by Race

Decatur County, Indiana has an estimated population of 26,422, a less than 1% change from the 26,472 recorded in the 2020 Census. The population is 93.1% White, 3.4% Multiracial, 2.5% Hispanic, 0.5% Native American/Other, 0.4% Black, and 0.1% Asian. 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 slightly more 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 County, that probability was 12.3% in 2020 and 13.2% in the most recent ACS estimates.

Decatur County is ranked the 59th most populous county in Indiana, out of 92 counties. Decatur County was ranked the 59th most populous county in the 2020 Census.

Decatur County's White Population

24,597 residents of Decatur County, or 93.1% of the population, identify as White. The share of White residents in Decatur County is significantly higher than in Indiana overall, where 75.4% of the population is White. Decatur County ranks 20th statewide in terms of White residents as a share of the population, out of 92 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 93.6% to 93.1%.

Decatur County is more White than neighboring Jennings County (92.8% White), Shelby County (89.8% White), and Bartholomew County (77.7% White). Decatur County is less White than neighboring Ripley County (94.2% White), and Rush County (94.4% White).

Decatur County's Black Population

103 residents of Decatur County, or 0.4% of the population, identify as Black. The share of Black residents in Decatur County is lower than in Indiana overall, where 9.1% of the population is Black. Decatur County ranks 75th statewide in terms of Black residents as a share of the population, out of 92 counties.

Since the 2020 Census, Decatur County's Black population has grown by an estimated 14.4%. Black residents' share of Decatur County's population has remained roughly unchanged at 0.4%.

Decatur County is more Black than neighboring Jennings County (0.3% Black). Decatur County is less Black than neighboring Ripley County (0.7% Black), Rush County (0.6% Black), Shelby County (1.4% Black), and Bartholomew County (1.8% Black).

Decatur County's Asian Population

22 residents of Decatur County, or 0.1% of the population, identify as Asian. The share of Asian residents in Decatur County is slightly lower than in Indiana overall, where 2.6% of the population is Asian. Decatur County ranks 36th statewide in terms of Asian residents as a share of the population, out of 92 counties.

Since the 2020 Census, Decatur County's Asian population has declined by an estimated 85.7%. Asian residents' share of Decatur County's population has decreased from 0.6% to 0.1%.

Decatur County is more Asian than neighboring Rush County (0% Asian). Decatur County is less Asian than neighboring Ripley County (0.5% Asian), Jennings County (0.5% Asian), Shelby County (1% Asian), and Bartholomew County (7.4% Asian).

Decatur County's Hispanic Population

667 residents of Decatur County, or 2.5% of the population, identify as Hispanic. The share of Hispanic residents in Decatur County is lower than in Indiana overall, where 8.6% of the population is Hispanic. Decatur County ranks 61st statewide in terms of Hispanic residents as a share of the population, out of 92 counties.

Since the 2020 Census, Decatur County's Hispanic population has grown by an estimated 8.6%. Hispanic residents' share of Decatur County's population has remained roughly unchanged at 2.5%.

Decatur County is more Hispanic than neighboring Ripley County (2% Hispanic), and Rush County (1.9% Hispanic). Decatur County is less Hispanic than neighboring Jennings County (3.5% Hispanic), Shelby County (5.6% Hispanic), and Bartholomew County (9.2% Hispanic).

Decatur County's Native American/Other Population

135 residents of Decatur County, or 0.5% 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 Indiana overall, where 0.5% of the population is Native American/Other. Decatur County ranks 86th statewide in terms of Native American/Other residents as a share of the population, out of 92 counties.

Since the 2020 Census, Decatur County's Native American/Other population has grown by an estimated 64.6%. Native American/Other residents' share of Decatur County's population has remained roughly unchanged at 0.5%.

Decatur County is more Native American/Other than neighboring Ripley County (0.4% Native American/Other), Rush County (0.4% Native American/Other), and Shelby County (0.1% Native American/Other).

Decatur County's Multiracial Population

898 residents of Decatur County, or 3.4% of the population, identify as Multiracial. The share of Multiracial residents in Decatur County is comparable to the share in Indiana overall, where 3.8% of the population is Multiracial. Decatur County ranks 66th statewide in terms of Multiracial residents as a share of the population, out of 92 counties.

Since the 2020 Census, Decatur County's Multiracial population has grown by an estimated 17.7%. Multiracial residents' share of Decatur County's population has increased from 2.9% to 3.4%.

Decatur County is more Multiracial than neighboring Ripley County (2.2% Multiracial), Rush County (2.7% Multiracial), Jennings County (2.5% Multiracial), and Shelby County (2.1% 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.