Atchison County Demographics

A map of Atchison County's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	14,053	13,925	86.7%	85.2%
Multiracial	880	842	5.4%	5.2%
Hispanic	608	583	3.8%	3.6%
Black	567	785	3.5%	4.8%
Asian	51	80	0.3%	0.5%
Native American/Other	49	133	0.3%	0.8%

Atchison County, Kansas has an estimated population of 16,208, a less than 1% change from the 16,348 recorded in the 2020 Census. The population is 86.7% White, 5.4% Multiracial, 3.8% Hispanic, 3.5% Black, 0.3% Asian, and 0.3% Native American/Other. This demographic dot map shows the population of Atchison County, with one dot drawn for each person counted by the Census, color-coded by race.

Atchison has become less 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 Atchison County, that probability was 26.8% in 2020 and 24.3% in the most recent ACS estimates.

Atchison County is ranked the 31st most populous county in Kansas, out of 105 counties. Atchison County was ranked the 31st most populous county in the 2020 Census.

Atchison County's White Population

14,053 residents of Atchison County, or 86.7% of the population, identify as White. The share of White residents in Atchison County is considerably higher than in Kansas overall, where 72.7% of the population is White. Atchison County ranks 61st statewide in terms of White residents as a share of the population, out of 105 counties.

Since the 2020 Census, Atchison County's White population has remained roughly the same. White residents' share of Atchison County's population has increased from 85.2% to 86.7%.

Atchison County is more White than neighboring Brown County (81.5% White), Leavenworth County (77.4% White), and Jackson County (81.6% White). Atchison County is less White than neighboring Jefferson County (91.1% White), and Doniphan County (88% White).

Atchison County's Black Population

567 residents of Atchison County, or 3.5% of the population, identify as Black. The share of Black residents in Atchison County is comparable to the share in Kansas overall, where 5.2% of the population is Black. Atchison County ranks 8th statewide in terms of Black residents as a share of the population, out of 105 counties.

Since the 2020 Census, Atchison County's Black population has declined by an estimated 27.8%. Black residents' share of Atchison County's population has decreased from 4.8% to 3.5%.

Atchison County is more Black than neighboring Jefferson County (0.4% Black), Doniphan County (3% Black), Brown County (1.6% Black), and Jackson County (0.7% Black). Atchison County is less Black than neighboring Leavenworth County (6.8% Black).

Atchison County's Asian Population

51 residents of Atchison County, or 0.3% of the population, identify as Asian. The share of Asian residents in Atchison County is slightly lower than in Kansas overall, where 2.9% of the population is Asian. Atchison County ranks 42nd statewide in terms of Asian residents as a share of the population, out of 105 counties.

Since the 2020 Census, Atchison County's Asian population has declined by an estimated 36.3%. Asian residents' share of Atchison County's population has remained roughly unchanged at 0.3%.

Atchison County is more Asian than neighboring Jefferson County (0.2% Asian), and Doniphan County (0.1% Asian). Atchison County is less Asian than neighboring Leavenworth County (1.3% Asian), and Jackson County (0.5% Asian).

Atchison County's Hispanic Population

608 residents of Atchison County, or 3.8% of the population, identify as Hispanic. The share of Hispanic residents in Atchison County is lower than in Kansas overall, where 13.6% of the population is Hispanic. Atchison County ranks 75th statewide in terms of Hispanic residents as a share of the population, out of 105 counties.

Since the 2020 Census, Atchison County's Hispanic population has grown by an estimated 4.3%. Hispanic residents' share of Atchison County's population has remained roughly unchanged at 3.8%.

Atchison County is more Hispanic than neighboring Jefferson County (3.5% Hispanic), and Doniphan County (3.5% Hispanic). Atchison County is less Hispanic than neighboring Brown County (4.7% Hispanic), Leavenworth County (7.6% Hispanic), and Jackson County (5.8% Hispanic).

Atchison County's Native American/Other Population

49 residents of Atchison 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 Atchison County is comparable to the share in Kansas overall, where 0.9% of the population is Native American/Other. Atchison County ranks 44th statewide in terms of Native American/Other residents as a share of the population, out of 105 counties.

Since the 2020 Census, Atchison County's Native American/Other population has declined by an estimated 63.2%. Native American/Other residents' share of Atchison County's population has decreased from 0.8% to 0.3%.

Atchison County is less Native American/Other than neighboring Jefferson County (0.7% Native American/Other), Doniphan County (0.4% Native American/Other), Brown County (7.3% Native American/Other), Leavenworth County (1% Native American/Other), and Jackson County (5.5% Native American/Other).

Atchison County's Multiracial Population

880 residents of Atchison County, or 5.4% of the population, identify as Multiracial. The share of Multiracial residents in Atchison County is comparable to the share in Kansas overall, where 4.8% of the population is Multiracial. Atchison County ranks 23rd statewide in terms of Multiracial residents as a share of the population, out of 105 counties.

Since the 2020 Census, Atchison County's Multiracial population has grown by an estimated 4.5%. Multiracial residents' share of Atchison County's population has remained roughly unchanged at 5.4%.

Atchison County is more Multiracial than neighboring Jefferson County (4% Multiracial), Doniphan County (5.1% Multiracial), and Brown County (4.7% Multiracial). Atchison County is less Multiracial than neighboring Leavenworth County (5.9% Multiracial), and Jackson County (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.