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 distinguished by its share of foreign-born residents, 11.5% of the population. Marion County is a county in Kentucky with a population of 19,680.
Earnings trail the nation, with the median household making $55,404, below the US median of $78,538. Poverty sits at 14.1%, above the national 12.4%. Homes carry a median value of $158,700, with typical rent around $731.
College credentials are comparatively rare here: just 12.7%, below the national 35.0%. Remote work is rare here (2.9%, below the national 14.0%), and the average commute runs about 21 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+
Largest cities in Kentucky
Other counties in Kentucky
Part of Kentucky
Metro areas in Kentucky
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.
More from Kentucky
Population 777,392
Population 321,122
Population 169,817
Population 137,676
Full rankings of Kentucky counties
Statewide data for Kentucky
Population, race, income, age, and trends across Kentucky
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.