Marion County, Kentucky Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 60th-largest in Kentucky
The population of Marion County, Kentucky is 19,680 as of the 2023 American Community Survey, making it the 60th-largest county in Kentucky. The median household income is $55,404, the median home value is $158,700, and the median age is 39.6.
The population of Marion County has declined 0.0% since 2010 (19,853 → 19,851), a -0.00% annualized rate.
19,680
Population
-0.00%
Annual growth
57
People / sq mi
$55,404
Median Income
$158,700
Median Home Value
Marion County covers 344 sq mi of land at 57.3 people per square mile.
About Marion County, KY
Marion County is a county in Kentucky with a population of 19,680. It ranks #60 among counties in Kentucky by population. The median age is 39.6, in line with the national median. The population is 49.7% male and 50.3% female.
The median household income in Marion County is $55,404, below the US median of $74,580. 14.1% of residents live below the federal poverty level. Home values sit at a median of $158,700, with monthly rent averaging $731. The homeownership rate of 77.3% is higher than the national rate of 64.8%.
Educational attainment in Marion County reflects 12.7% of adults 25 and older holding a bachelor's degree or higher, below the national average of 34.3%. Roughly 2.9% of workers primarily work from home, below the national work-from-home rate of 14.2%. The average commute is 20.8 minutes each way.
Marion County Population History (2010-2024)
The county of Marion County had a population of 19,853 in 2010 and 19,851 in 2024, a 0.0% growth over 14 years. The peak was 20,012 in 2011. Average annual growth rate: 0.01%.
19,851
Population (2024)
19,853
Population (2010)
20,012
Peak (2011)
0.01%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 19,853 |
| 2011 | 20,012 |
| 2012 | 19,929 |
| 2013 | 19,934 |
| 2014 | 19,084 |
| 2015 | 19,219 |
| 2016 | 19,136 |
| 2017 | 19,284 |
| 2018 | 19,314 |
| 2019 | 19,237 |
| 2020 | 19,594 |
| 2021 | 19,728 |
| 2022 | 19,731 |
| 2023 | 19,840 |
| 2024 | 19,851 |
Race & Ethnicity
| White | 88.2% |
| Black or African American | 7.2% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 0.6% |
| Two or More Races | 0.0% |
Age & Sex
39.6
Median Age
50.3%
Female
49.7%
Male
16.9%
Age 65+
Age Distribution
Children (under 15): 19.6% · Seniors (65+): 16.9%
Income & Poverty
| Median household income | $55,404$-7,013 vs state |
| Mean household income | $68,294 |
| Per-capita income | $27,866 |
| Poverty rate | 14.1%+2.3% vs state |
| Unemployment rate | 3.0% |
| Employment-to-population | 52.3% |
Top Industries by Employment
The largest employment sector in Marion County is manufacturing, accounting for 33.4% of workers.
How residents commute
0.0%
Drive alone
0.4%
Carpool
88.2%
Public transit
2.9%
Work from home
20.8 min
Avg commute
Housing
$158,700$-33,600 vs state
Median home value
$731
Median rent
77.3%
Homeownership rate
8,427
Total housing units
90.1%
Occupied
9.9%
Vacant
22.7%
Renter-occupied
Social & access
96.9%
With health insurance
88.0%
With broadband internet
11.5%
Foreign-born
7.5%
Veterans (18+)
20.5%
With a disability
96.7%
Speak language other than English at home
Education
86.3%
High School+
12.7%
Bachelor's+
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County rankings
Frequently Asked Questions
Marion County, Kentucky has a population of 19,680 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 60th-largest county in Kentucky. Population density is 57 people per square mile.
The population of Marion County has declined 0.0% since 2010 (19,853 → 19,851), a -0.00% annualized rate.
The median household income in Marion County, Kentucky is $55,404, with mean (average) household income of $68,294 and per-capita income of $27,866. 14.1% of residents live below the federal poverty level.
In Marion County, the largest racial and ethnic groups are White (88.2%), Black or African American (7.2%), Hispanic or Latino (0.6%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Marion County, Kentucky is 39.6 years. Residents are 50.3% female and 49.7% male.
The median home value in Marion County is $158,700 and median monthly rent is $731. 77.3% of occupied housing units are owner-occupied. The county has 8,427 total housing units, 9.9% of which are vacant.
The largest employment sector in Marion County, Kentucky is manufacturing, employing 33.4% of workers. The unemployment rate is 3.0%.
Louisville/Jefferson County is among the largest cities associated with Marion County, Kentucky, with a population of 627,210.
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.