Marion County Demographics

A map of Marion County's Population by Race

Marion County, Kansas has an estimated population of 11,754, a less than 1% change from the 11,823 recorded in the 2020 Census. The population is 90.9% White, 4.2% Hispanic, 2.8% Multiracial, 0.9% Black, 0.7% Native American/Other, and 0.4% Asian. This demographic dot map shows the population of Marion County, with one dot drawn for each person counted by the Census, color-coded by race.

Marion is about as racially diverse as it was in 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 Marion County, that probability was 17.1% in 2020 and 17.1% in the most recent ACS estimates.

Marion County is ranked the 37th most populous county in Kansas, out of 105 counties. Marion County was ranked the 37th most populous county in the 2020 Census.

Marion County's White Population

10,687 residents of Marion County, or 90.9% of the population, identify as White. The share of White residents in Marion County is significantly higher than in Kansas overall, where 72.7% of the population is White. Marion County ranks 25th statewide in terms of White residents as a share of the population, out of 105 counties.

Since the 2020 Census, Marion County's White population has remained roughly the same. White residents' share of Marion County's population has remained roughly unchanged at 90.9%.

Marion County is more White than neighboring Harvey County (81.2% White), Chase County (86.3% White), Dickinson County (88.4% White), McPherson County (89.1% White), and Morris County (90% White).

Marion County's Black Population

107 residents of Marion County, or 0.9% of the population, identify as Black. The share of Black residents in Marion County is slightly lower than in Kansas overall, where 5.2% of the population is Black. Marion County ranks 42nd statewide in terms of Black residents as a share of the population, out of 105 counties.

Since the 2020 Census, Marion County's Black population has declined by an estimated 9.3%. Black residents' share of Marion County's population has remained roughly unchanged at 0.9%.

Marion County is more Black than neighboring Dickinson County (0.1% Black), and Morris County (0% Black). Marion County is less Black than neighboring Harvey County (1.4% Black), Chase County (1.1% Black), and McPherson County (1.7% Black).

Marion County's Asian Population

45 residents of Marion County, or 0.4% of the population, identify as Asian. The share of Asian residents in Marion County is slightly lower than in Kansas overall, where 2.9% of the population is Asian. Marion County ranks 69th statewide in terms of Asian residents as a share of the population, out of 105 counties.

Since the 2020 Census, Marion County's Asian population has grown by an estimated 15.4%. Asian residents' share of Marion County's population has remained roughly unchanged at 0.4%.

Marion County is more Asian than neighboring Dickinson County (0.2% Asian). Marion County is less Asian than neighboring Harvey County (1.1% Asian), Chase County (0.5% Asian), and Morris County (0.7% Asian).

Marion County's Hispanic Population

494 residents of Marion County, or 4.2% of the population, identify as Hispanic. The share of Hispanic residents in Marion County is lower than in Kansas overall, where 13.6% of the population is Hispanic. Marion County ranks 72nd statewide in terms of Hispanic residents as a share of the population, out of 105 counties.

Since the 2020 Census, Marion County's Hispanic population has grown by an estimated 11.8%. Hispanic residents' share of Marion County's population has increased from 3.7% to 4.2%.

Marion County is less Hispanic than neighboring Harvey County (12.2% Hispanic), Chase County (8.4% Hispanic), Dickinson County (5.7% Hispanic), McPherson County (5.6% Hispanic), and Morris County (4.3% Hispanic).

Marion County's Native American/Other Population

87 residents of Marion County, or 0.7% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Marion County is comparable to the share in Kansas overall, where 0.9% of the population is Native American/Other. Marion County ranks 35th statewide in terms of Native American/Other residents as a share of the population, out of 105 counties.

Since the 2020 Census, Marion County's Native American/Other population has declined by an estimated 20.2%. Native American/Other residents' share of Marion County's population has remained roughly unchanged at 0.7%.

Marion County is more Native American/Other than neighboring Harvey County (0.4% Native American/Other), Chase County (0.2% Native American/Other), Dickinson County (0.5% Native American/Other), McPherson County (0.1% Native American/Other), and Morris County (0.1% Native American/Other).

Marion County's Multiracial Population

334 residents of Marion County, or 2.8% of the population, identify as Multiracial. The share of Multiracial residents in Marion County is comparable to the share in Kansas overall, where 4.8% of the population is Multiracial. Marion County ranks 79th statewide in terms of Multiracial residents as a share of the population, out of 105 counties.

Since the 2020 Census, Marion County's Multiracial population has declined by an estimated 8.5%. Multiracial residents' share of Marion County's population has remained roughly unchanged at 2.8%.

Marion County is less Multiracial than neighboring Harvey County (3.6% Multiracial), Chase County (3.5% Multiracial), Dickinson County (5.1% Multiracial), McPherson County (3.1% Multiracial), and Morris County (4.9% 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.