Marion County Demographics

A map of Marion County's Population by Race

Marion County, Kentucky has an estimated population of 19,749, a less than 1% change from the 19,581 recorded in the 2020 Census. The population is 86.4% White, 7.6% Black, 3.7% Hispanic, 1.7% Multiracial, 0.6% Asian, and 0.0% Native American/Other. 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 has become less racially diverse since the 2020 Census. It is considerably less diverse than Kentucky 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 25.9% in 2020 and 24.6% in the most recent ACS estimates.

Marion County is ranked the 60th most populous county in Kentucky, out of 120 counties. Marion County was ranked the 59th most populous county in the 2020 Census.

Marion County's White Population

17,065 residents of Marion County, or 86.4% of the population, identify as White. The share of White residents in Marion County is slightly higher than in Kentucky overall, where 81.5% of the population is White. Marion County ranks 96th statewide in terms of White residents as a share of the population, out of 120 counties.

Since the 2020 Census, Marion County's White population has grown by an estimated 1.7%. White residents' share of Marion County's population has increased from 85.7% to 86.4%.

Marion County is more White than neighboring Boyle County (82.7% White). Marion County is less White than neighboring Taylor County (87.7% White), Washington County (87.4% White), Nelson County (89.1% White), and Green County (93.3% White).

Marion County's Black Population

1,493 residents of Marion County, or 7.6% of the population, identify as Black. The share of Black residents in Marion County is comparable to the share in Kentucky overall, where 7.6% of the population is Black. Marion County ranks 18th statewide in terms of Black residents as a share of the population, out of 120 counties.

Since the 2020 Census, Marion County's Black population has grown by an estimated 23.5%. Black residents' share of Marion County's population has increased from 6.2% to 7.6%.

Marion County is more Black than neighboring Taylor County (4.6% Black), Washington County (4.6% Black), Nelson County (5.2% Black), Green County (1.3% Black), and Boyle County (7% Black).

Marion County's Asian Population

125 residents of Marion County, or 0.6% of the population, identify as Asian. The share of Asian residents in Marion County is comparable to the share in Kentucky overall, where 1.6% of the population is Asian. Marion County ranks 27th statewide in terms of Asian residents as a share of the population, out of 120 counties.

Since the 2020 Census, Marion County's Asian population has grown by an estimated 1.6%. Asian residents' share of Marion County's population has remained roughly unchanged at 0.6%.

Marion County is more Asian than neighboring Nelson County (0.5% Asian), and Green County (0% Asian). Marion County is less Asian than neighboring Taylor County (1% Asian), and Boyle County (0.8% Asian).

Marion County's Hispanic Population

723 residents of Marion County, or 3.7% of the population, identify as Hispanic. The share of Hispanic residents in Marion County is comparable to the share in Kentucky overall, where 5% of the population is Hispanic. Marion County ranks 32nd statewide in terms of Hispanic residents as a share of the population, out of 120 counties.

Since the 2020 Census, Marion County's Hispanic population has grown by an estimated 6.2%. Hispanic residents' share of Marion County's population has remained roughly unchanged at 3.7%.

Marion County is more Hispanic than neighboring Taylor County (3.1% Hispanic), Washington County (0.2% Hispanic), Nelson County (2.9% Hispanic), and Green County (2.3% Hispanic). Marion County is less Hispanic than neighboring Boyle County (4.7% Hispanic).

Marion County's Native American/Other Population

4 residents of Marion County, or 0.0% 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 Kentucky overall, where 0.4% of the population is Native American/Other. Marion County ranks 36th statewide in terms of Native American/Other residents as a share of the population, out of 120 counties.

Since the 2020 Census, Marion County's Native American/Other population has declined by an estimated 96.0%. Native American/Other residents' share of Marion County's population has decreased from 0.5% to 0.0%.

Marion County is less Native American/Other than neighboring Nelson County (0.1% Native American/Other), Green County (0.1% Native American/Other), and Boyle County (0.6% Native American/Other).

Marion County's Multiracial Population

339 residents of Marion County, or 1.7% of the population, identify as Multiracial. The share of Multiracial residents in Marion County is slightly lower than in Kentucky overall, where 3.9% of the population is Multiracial. Marion County ranks 50th statewide in terms of Multiracial residents as a share of the population, out of 120 counties.

Since the 2020 Census, Marion County's Multiracial population has declined by an estimated 50.8%. Multiracial residents' share of Marion County's population has decreased from 3.5% to 1.7%.

Marion County is less Multiracial than neighboring Taylor County (3.6% Multiracial), Washington County (7.2% Multiracial), Nelson County (2.2% Multiracial), Green County (3.1% Multiracial), and Boyle County (4.2% 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.