Population of Counties in Kentucky (2020)

In 2019, the most populous county located in the state of Kentucky is Jefferson County, home to the city of Louisville, which has a population that’s grown to 770,517 since the last census was taken in 2010. Jefferson County has experienced a growth rate of 3.84%. Other large counties in state of Kentucky include Fayette County (323,780) with the city of Lexington, Kenton County (166,051) with the city of Covington and part of the Cincinnati metro area, Boone County (131,533), Warren County (131,264), Hardin County (110,356), and Daviess County (101,104). Of these counties, Warren County had the most rapid growth of 14.82%.

Kentucky Counties with the Fewest Residents

The county with the lowest population in the state of Kentucky is Robertson County, which has a population of 2,315. Since the last census in 2010, Robertson County has had a growth rate of -6.15%. Following Robertson County, other very small counties in Kentucky are Hickman County (4,421), Owsley County (4,472), and Carlisle County (4,771). All of these counties have experienced a decline in population, the greatest of which occurred in Hickman County with a growth rate of -9.01%.

Kentucky Counties with Rapid Growth

The county with the most rapid growth in Kentucky is Scott County, which has seen a population growth of 18.51% since the 2010 census, bringing the population up to 56,051 in 2019. Following Scott County are Warren County (14.82%), Shelby County (14.79%), and Jessamine County (10.75%). Martin County has the highest population decrease with a loss of 12.31% of its residents.

Name 2020 Population Growth Since 2010
Jefferson County770,7973.87%
Fayette County326,95410.14%
Kenton County167,3334.61%
Warren County135,80218.79%
Boone County133,37711.73%
Hardin County114,6167.16%
Daviess County102,2205.70%
Madison County94,65213.40%
Campbell County94,3624.14%
Bullitt County82,63910.93%
Christian County72,509-2.18%
Oldham County66,4329.92%
McCracken County65,244-0.45%
Pulaski County65,1553.11%
Laurel County61,4094.09%
Scott County58,51323.76%
Pike County57,482-11.67%
Jessamine County55,19813.38%
Franklin County51,4374.41%
Shelby County50,56419.63%
Nelson County46,3296.18%
Boyd County46,202-6.86%
Barren County44,8986.59%
Henderson County44,795-3.17%
Hopkins County44,466-5.07%
Calloway County39,6756.23%
Graves County37,6050.98%
Clark County36,8673.55%
Whitley County36,4682.10%
Floyd County35,013-12.32%
Greenup County34,822-5.58%
Marshall County30,951-1.59%
Knox County30,944-2.85%
Muhlenberg County30,476-3.73%
Boyle County30,3845.99%
Meade County29,9574.33%
Montgomery County28,6978.08%
Logan County26,9390.32%
Woodford County26,8077.09%
Carter County26,626-4.04%
Grayson County26,4352.50%
Bell County25,899-9.79%
Harlan County25,777-11.78%
Taylor County25,5233.48%
Grant County25,3632.77%
Perry County25,318-11.66%
Lincoln County24,9360.87%
Rowan County24,6255.35%
Ohio County23,9890.65%
Anderson County22,9536.97%
Mercer County22,1463.91%
Johnson County22,016-5.85%
Allen County21,5247.36%
Letcher County21,041-14.24%
Breckinridge County20,8624.09%
Bourbon County20,2881.61%
Wayne County20,162-3.29%
Clay County19,769-8.73%
Marion County19,580-1.26%
Spencer County19,44013.54%
Simpson County19,37711.75%
Hart County19,1945.55%
Adair County19,0571.58%
Harrison County18,8740.38%
Russell County17,9852.34%
Garrard County17,6864.39%
McCreary County17,378-5.19%
Mason County17,000-2.88%
Rockcastle County16,736-2.02%
Henry County16,3306.20%
Casey County16,0760.58%
Lawrence County15,243-3.93%
Trigg County15,0815.28%
Knott County14,808-9.50%
Larue County14,4992.27%
Pendleton County14,471-2.98%
Fleming County14,4400.28%
Union County14,235-6.83%
Estill County14,140-3.89%
Morgan County13,613-0.84%
Jackson County13,4860.04%
Webster County13,191-2.86%
Lewis County13,055-5.64%
Caldwell County12,791-1.68%
Butler County12,720-0.11%
Powell County12,6840.32%
Todd County12,5330.81%
Bath County12,3936.69%
Washington County12,3745.77%
Edmonson County12,3260.80%
Breathitt County12,316-11.12%
Magoffin County12,008-9.77%
Owen County11,0621.95%
Green County11,019-2.03%
Martin County10,979-14.98%
Monroe County10,932-0.35%
Carroll County10,755-0.47%
Clinton County10,140-1.02%
Metcalfe County9,932-2.02%
Leslie County9,811-13.01%
McLean County9,318-2.07%
Livingston County9,198-3.38%
Gallatin County9,0064.56%
Hancock County8,7181.95%
Crittenden County8,703-6.39%
Trimble County8,415-4.51%
Bracken County8,163-4.13%
Lee County7,9192.60%
Ballard County7,895-4.42%
Lyon County7,801-6.36%
Elliott County7,508-4.27%
Nicholas County7,2241.35%
Wolfe County7,041-4.37%
Cumberland County6,585-4.06%
Menifee County6,4210.86%
Fulton County5,952-12.55%
Carlisle County4,657-8.40%
Owsley County4,584-3.45%
Hickman County4,217-13.21%
Robertson County2,141-5.89%