Decatur County Demographics

A map of Decatur County's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	2,467	2,565	90.5%	92.8%
Hispanic	130	76	4.8%	2.7%
Multiracial	72	94	2.6%	3.4%
Black	31	9	1.1%	0.3%
Native American/Other	26	10	1.0%	0.4%
Asian	0	10	0.0%	0.4%

Decatur County, Kansas has an estimated population of 2,726, a slight decrease from the 2,764 recorded in the 2020 Census. The population is 90.5% White, 4.8% Hispanic, 2.6% Multiracial, 1.1% Black, 1.0% Native American/Other, and 0.0% 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 more racially diverse since the 2020 Census. It is considerably less diverse than Kansas 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 13.7% in 2020 and 17.8% in the most recent ACS estimates.

Decatur County is ranked the 86th most populous county in Kansas, out of 105 counties. Decatur County was ranked the 85th most populous county in the 2020 Census.

Decatur County's White Population

2,467 residents of Decatur County, or 90.5% of the population, identify as White. The share of White residents in Decatur County is significantly higher than in Kansas overall, where 72.7% of the population is White. Decatur County ranks 10th statewide in terms of White residents as a share of the population, out of 105 counties.

Since the 2020 Census, Decatur County's White population has declined by an estimated 3.8%. White residents' share of Decatur County's population has decreased from 92.8% to 90.5%.

Decatur County is more White than neighboring Red Willow County (88.8% White), Norton County (85.7% White), and Rawlins County (88.5% White). Decatur County is less White than neighboring Sheridan County (91.3% White), and Furnas County (91.4% White).

Decatur County's Black Population

31 residents of Decatur County, or 1.1% of the population, identify as Black. The share of Black residents in Decatur County is slightly lower than in Kansas overall, where 5.2% of the population is Black. Decatur County ranks 78th statewide in terms of Black residents as a share of the population, out of 105 counties.

Since the 2020 Census, Decatur County's Black population has grown by an estimated 244.4%. Black residents' share of Decatur County's population has increased from 0.3% to 1.1%.

Decatur County is more Black than neighboring Red Willow County (1% Black), Sheridan County (0% Black), Rawlins County (0% Black), and Furnas County (0.4% Black). Decatur County is less Black than neighboring Norton County (3.1% Black).

Decatur County's Asian Population

0 residents of Decatur County, or 0.0% of the population, identify as Asian. The share of Asian residents in Decatur County is slightly lower than in Kansas overall, where 2.9% of the population is Asian. Decatur County ranks 63rd statewide in terms of Asian residents as a share of the population, out of 105 counties.

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

Decatur County is less Asian than neighboring Red Willow County (0.3% Asian), Norton County (0.1% Asian), Rawlins County (0.8% Asian), and Furnas County (0.2% Asian).

Decatur County's Hispanic Population

130 residents of Decatur County, or 4.8% of the population, identify as Hispanic. The share of Hispanic residents in Decatur County is lower than in Kansas overall, where 13.6% of the population is Hispanic. Decatur County ranks 86th statewide in terms of Hispanic residents as a share of the population, out of 105 counties.

Since the 2020 Census, Decatur County's Hispanic population has grown by an estimated 71.1%. Hispanic residents' share of Decatur County's population has increased from 2.7% to 4.8%.

Decatur County is less Hispanic than neighboring Red Willow County (6.3% Hispanic), Sheridan County (5.9% Hispanic), Norton County (5.9% Hispanic), Rawlins County (7.7% Hispanic), and Furnas County (5.1% Hispanic).

Decatur County's Native American/Other Population

26 residents of Decatur County, or 1.0% 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 Kansas overall, where 0.9% of the population is Native American/Other. Decatur County ranks 97th statewide in terms of Native American/Other residents as a share of the population, out of 105 counties.

Since the 2020 Census, Decatur County's Native American/Other population has grown by an estimated 160.0%. Native American/Other residents' share of Decatur County's population has increased from 0.4% to 1.0%.

Decatur County is more Native American/Other than neighboring Red Willow County (0.2% Native American/Other), and Sheridan County (0.3% Native American/Other). Decatur County is less Native American/Other than neighboring Norton County (1.4% Native American/Other), and Rawlins County (1.2% Native American/Other).

Decatur County's Multiracial Population

72 residents of Decatur County, or 2.6% of the population, identify as Multiracial. The share of Multiracial residents in Decatur County is slightly lower than in Kansas overall, where 4.8% of the population is Multiracial. Decatur County ranks 68th statewide in terms of Multiracial residents as a share of the population, out of 105 counties.

Since the 2020 Census, Decatur County's Multiracial population has declined by an estimated 23.4%. Multiracial residents' share of Decatur County's population has decreased from 3.4% to 2.6%.

Decatur County is more Multiracial than neighboring Sheridan County (2.5% Multiracial), Rawlins County (1.8% Multiracial), and Furnas County (2% Multiracial). Decatur County is less Multiracial than neighboring Red Willow County (3.4% Multiracial), and Norton County (3.7% 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.