Allen County Demographics

A map of Allen County's Population by Race

Allen County, Kansas has an estimated population of 12,483, a less than 1% change from the 12,526 recorded in the 2020 Census. The population is 88.5% White, 4.3% Hispanic, 3.0% Multiracial, 2.8% Black, 1.0% Native American/Other, and 0.4% Asian. This demographic dot map shows the population of Allen County, with one dot drawn for each person counted by the Census, color-coded by race.

Allen 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 Allen County, that probability was 22.6% in 2020 and 21.3% in the most recent ACS estimates.

Allen County is ranked the 36th most populous county in Kansas, out of 105 counties. Allen County was ranked the 36th most populous county in the 2020 Census.

Allen County's White Population

11,048 residents of Allen County, or 88.5% of the population, identify as White. The share of White residents in Allen County is significantly higher than in Kansas overall, where 72.7% of the population is White. Allen County ranks 44th statewide in terms of White residents as a share of the population, out of 105 counties.

Since the 2020 Census, Allen County's White population has remained roughly the same. White residents' share of Allen County's population has increased from 87.7% to 88.5%.

Allen County is more White than neighboring Neosho County (88% White). Allen County is less White than neighboring Anderson County (90.9% White), Woodson County (91.4% White), Bourbon County (88.8% White), and Wilson County (90.4% White).

Allen County's Black Population

352 residents of Allen County, or 2.8% of the population, identify as Black. The share of Black residents in Allen County is slightly lower than in Kansas overall, where 5.2% of the population is Black. Allen County ranks 31st statewide in terms of Black residents as a share of the population, out of 105 counties.

Since the 2020 Census, Allen County's Black population has grown by an estimated 103.5%. Black residents' share of Allen County's population has increased from 1.4% to 2.8%.

Allen County is more Black than neighboring Neosho County (1.5% Black), Anderson County (1.1% Black), Woodson County (0.2% Black), Bourbon County (1.7% Black), and Wilson County (0.2% Black).

Allen County's Asian Population

46 residents of Allen County, or 0.4% of the population, identify as Asian. The share of Asian residents in Allen County is slightly lower than in Kansas overall, where 2.9% of the population is Asian. Allen County ranks 35th statewide in terms of Asian residents as a share of the population, out of 105 counties.

Since the 2020 Census, Allen County's Asian population has declined by an estimated 31.3%. Asian residents' share of Allen County's population has remained roughly unchanged at 0.4%.

Allen County is more Asian than neighboring Anderson County (0% Asian), Woodson County (0% Asian), and Wilson County (0% Asian). Allen County is less Asian than neighboring Neosho County (0.5% Asian), and Bourbon County (0.8% Asian).

Allen County's Hispanic Population

533 residents of Allen County, or 4.3% of the population, identify as Hispanic. The share of Hispanic residents in Allen County is lower than in Kansas overall, where 13.6% of the population is Hispanic. Allen County ranks 70th statewide in terms of Hispanic residents as a share of the population, out of 105 counties.

Since the 2020 Census, Allen County's Hispanic population has grown by an estimated 6.2%. Hispanic residents' share of Allen County's population has remained roughly unchanged at 4.3%.

Allen County is more Hispanic than neighboring Anderson County (1.8% Hispanic), Woodson County (2.9% Hispanic), Bourbon County (3.1% Hispanic), and Wilson County (3.8% Hispanic). Allen County is less Hispanic than neighboring Neosho County (6% Hispanic).

Allen County's Native American/Other Population

131 residents of Allen 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 Allen County is comparable to the share in Kansas overall, where 0.9% of the population is Native American/Other. Allen County ranks 15th statewide in terms of Native American/Other residents as a share of the population, out of 105 counties.

Since the 2020 Census, Allen County's Native American/Other population has declined by an estimated 25.6%. Native American/Other residents' share of Allen County's population has remained roughly unchanged at 1.0%.

Allen County is more Native American/Other than neighboring Neosho County (0.2% Native American/Other), Anderson County (0.1% Native American/Other), Woodson County (0.3% Native American/Other), Bourbon County (0.3% Native American/Other), and Wilson County (0.9% Native American/Other).

Allen County's Multiracial Population

373 residents of Allen County, or 3.0% of the population, identify as Multiracial. The share of Multiracial residents in Allen County is comparable to the share in Kansas overall, where 4.8% of the population is Multiracial. Allen County ranks 27th statewide in terms of Multiracial residents as a share of the population, out of 105 counties.

Since the 2020 Census, Allen County's Multiracial population has declined by an estimated 39.5%. Multiracial residents' share of Allen County's population has decreased from 4.9% to 3.0%.

Allen County is less Multiracial than neighboring Neosho County (3.7% Multiracial), Anderson County (6.1% Multiracial), Woodson County (5.2% Multiracial), Bourbon County (5.2% Multiracial), and Wilson County (4.7% 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.