• county
  • FIPS 21155
  • Largest town: Lebanon

Marion County, Kentucky

Marion County had 19,851 residents in the Census Vintage 2024 estimate, on 343.6 square miles of land. It ranks 60th of 120 in Kentucky by population and 50th by land area.

Population
19,851
#60 of 120 in Kentucky · #1,835 in US
Area
343.6 sq mi
#50 of 120 in Kentucky · #2,700 in US
Density
58 / sq mi
#63 of 120 in Kentucky · #1,338 in US
Median household income
$54,466
#67 of 120 in Kentucky · #2,372 in US

Census Vintage 2024 estimates · SAIPE 2023 income · 2024 Gazetteer land area

Marion County within Kentucky. Pin: Frankfort.

Measure from here

Tools and pages that start from Marion County

Marion County population, land area and income

Marion County had 19,851 residents in the Census Vintage 2024 estimate, on 343.6 square miles of land. It ranks 60th of 120 in Kentucky by population and 50th by land area. That works out to 57.8 people per square mile, below the US average of 96.3, and above the national county median.

The median county-equivalent in Kentucky has 19,740 residents, about the same as Marion County.

Its SAIPE 2023 median household income of $54,466 is in the bottom quarter among 3,143 counties with an estimate.

National rank among 3,144

Population

19,851

3144th1st

1835th of 3,144 (US)

Land area

344 sq mi

3144th1st

2700th of 3,144 (US)

Density

57.8 / sq mi

3144th1st

1338th of 3,144 (US)

Median household income

$54,466

3143rd1st

2372nd of 3,143 (US)

Rank within Kentucky (120)

Population

19,851

120th1st

60th of 120 (KY)

Land area

344 sq mi

120th1st

50th of 120 (KY)

Density

57.8 / sq mi

120th1st

63rd of 120 (KY)

Median household income

$54,466

120th1st

67th of 120 (KY)

How Marion County's population changed since 2020

Marion County gained 257 residents between the July 2020 and July 2024 estimates, a rise of 1.3%. That ranks 62nd of 120 in Kentucky for growth. The median Kentucky county changed by +1.4%, and the state as a whole by +1.8%.

Since the April 2020 estimates base, Marion County recorded 894 births and 1,065 deaths, a natural change of -171. Net international migration added +76 and net domestic migration, people moving to or from other US counties, came to +370. The largest single component was domestic migration, which added 370 people.

19.6k202019.7k202119.7k202219.8k202319.9k2024
Census Vintage 2024 county estimates for July 1 of each year. The axis starts above zero so year-to-year changes are visible.

Components of change, April 2020 to July 2024

Births
894
Deaths
1,065
Net international migration
+76
Net domestic migration
+370
Change, July 2023 to July 2024
+11

Where Marion County is

The Census internal point of Marion County is at 37.552600, -85.269000. It sits in UTM zone 16N. The map shades Kentucky's 120 county-equivalents by population change from 2020 to 2024, darker for faster growth, with Marion County outlined. Dots are towns of 1,000+ people with residents in it.

Adair County: +1.9%Kenton County: +3.3%Owen County: +1.2%Morgan County: +4.1%Bracken County: +1.1%Edmonson County: +4.0%Trigg County: +3.4%Jackson County: +3.0%Spencer County: +6.8%Clark County: +1.7%Jessamine County: +6.6%Green County: +3.8%Henry County: +3.2%Graves County: +0.8%Webster County: -1.3%Washington County: +1.9%Ohio County: +0.8%Knott County: -5.1%Meade County: +1.4%Carroll County: +2.5%Scott County: +7.2%Lincoln County: +2.7%Greenup County: -1.7%Boyle County: +2.1%Hardin County: +1.8%Nelson County: +4.1%Hart County: +3.2%Christian County: -2.4%Carlisle County: -0.6%Crittenden County: -0.2%Elliott County: -1.0%Garrard County: +6.3%Larue County: +1.7%Lee County: -0.7%Leslie County: -7.1%Hancock County: -1.0%Lewis County: -1.6%Lyon County: +4.6%McLean County: -0.1%Magoffin County: -4.2%Martin County: -4.9%Mason County: -1.1%Rockcastle County: +1.0%Menifee County: +3.2%Russell County: +2.6%Whitley County: +1.5%Todd County: +3.9%Union County: -3.5%Wolfe County: -2.9%Bell County: -3.9%Boyd County: -0.9%Butler County: +1.9%Metcalfe County: +2.7%Grant County: +2.8%Simpson County: +3.7%Pike County: -5.2%Gallatin County: +1.5%Harlan County: -6.4%Fayette County: +2.1%Logan County: +3.5%Muhlenberg County: -1.2%Bath County: +1.8%Mercer County: +3.8%Barren County: +2.5%Franklin County: +1.6%Bullitt County: +4.2%Boone County: +5.6%Campbell County: +0.9%Jefferson County: +1.4%Wayne County: +0.4%Ballard County: -1.1%Anderson County: +4.1%Pulaski County: +2.7%Knox County: -1.7%Laurel County: +1.0%Breckinridge County: +3.8%Oldham County: +4.2%Letcher County: -6.2%Lawrence County: -3.1%McCracken County: -0.6%Nicholas County: +3.7%Owsley County: -2.6%Powell County: -1.3%Bourbon County: +0.2%Calloway County: +3.7%Henderson County: -1.1%Clinton County: -0.5%Warren County: +9.6%Montgomery County: +2.4%Floyd County: -3.5%Woodford County: +3.1%Hopkins County: -0.3%Johnson County: -2.4%Marshall County: +0.1%Estill County: -1.1%Cumberland County: +3.2%Fleming County: +3.3%Madison County: +7.1%Carter County: -1.9%Allen County: +7.1%Daviess County: +1.0%Harrison County: +4.3%Perry County: -5.7%Fulton County: -3.5%Clay County: -3.5%Robertson County: +9.1%Trimble County: +1.5%Taylor County: +3.1%Shelby County: +3.9%McCreary County: -0.2%Breathitt County: -6.5%Livingston County: -0.6%Hickman County: -3.0%Rowan County: -0.2%Casey County: +0.2%Monroe County: -1.4%Marion County: +1.3%Grayson County: +2.3%Caldwell County: -0.2%Pendleton County: +1.3%
Change 2020 to 2024
  1. < -1.6%
  2. < +0.2%
  3. < +1.9%
  4. < +3.7%
  5. ≥ +3.7%
no data

Orange pin: Marion County internal point. Dark pin: Frankfort.

Internal point

Decimal
37.552600, -85.269000
DMS
37°33'9.36"N 85°16'8.40"W
UTM
16N 652901.9E 4157584.9N
Geohash
dnemesjpb
Plus code
869PHP3J+2C

Towns in Marion County

One incorporated place of 1,000+ people has residents in Marion County, 6,558 people together, or 33% of the county. Each figure counts only the part of the town inside Marion County; towns marked "part" extend into another county. The largest is Lebanon with 6,558.

  1. 01Lebanon6,558
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering Marion County

The Census 2024 county adjacency file lists 6 neighbors for Marion County. The most populous is Nelson County, KY, with 48,706 residents. Distances run between Census internal points in a straight line.

Distance to Frankfort and the nearest big city

Frankfort is 48.8 miles NNE of Marion County's internal point in a straight line. The nearest place of 100,000 or more is Louisville/Jefferson County, KY (population 640,796), 47.1 miles away. The nearest place of 10,000 or more is Campbellsville, KY (population 11,820), 15.1 miles away.

Marion County FIPS code

The FIPS code of Marion County is 21155: state code 21 for Kentucky plus county code 155. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $54,466.

Questions people ask

What is the population of Marion County, Kentucky?

The Census Vintage 2024 estimate for July 1, 2024 is 19,851. That is up 257 people (1.3%) from the July 2020 estimate of 19,594.

What is the FIPS code of Marion County?

21155. The first two digits (21) are Kentucky; the last three (155) identify the county.

What is the largest town in Marion County?

Lebanon, with 6,558 residents inside Marion County in 2024.

Which counties border Marion County?

6 county-equivalents border it in the Census 2024 adjacency file: Nelson County, KY; Boyle County, KY; Taylor County, KY; Casey County, KY; Larue County, KY; Washington County, KY.

Sources and data as of

Data as of: Census Vintage 2024 population estimates, 2024 Gazetteer land area and internal points, SAIPE 2023 median household income.

  1. 01Census Vintage 2024 county population estimates
  2. 02Census 2024 Gazetteer, counties
  3. 03Census SAIPE 2023 state and county estimates
  4. 04Census Vintage 2024 subcounty population estimates
  5. 05Census 2024 county adjacency file
  6. 06Census 2024 cartographic boundary file, counties (1:5,000,000)

How every number is computed: methodology. Spotted a wrong figure? Report an error.