Data / Rankings / Population aged 18 to 64 / Counties in Kentucky

Counties in Kentucky by population aged 18 to 64

Rowan County had the highest population aged 18 to 64 of 120 counties in 2021, at 65.5%. Hickman County had the lowest, at 53.1%. The median was 58.2% and the figure for Kentucky was 59.9%. Source: the U.S. Census Bureau.

Highest65.5Rowan County
Lowest53.1Hickman County
Median58.2120 counties
Kentucky59.9History

Top 40 counties, 2021

Rowan County: 65.5 %Rowan County65.5Fayette County: 64.1 %Fayette County64.1Martin County: 63.4 %Martin County63.4Madison County: 63.4 %Madison County63.4Lee County: 63.3 %Lee County63.3Warren County: 63 %Warren County63Morgan County: 62.9 %Morgan County62.9Calloway County: 62.8 %Calloway County62.8Elliott County: 62.1 %Elliott County62.1Campbell County: 62 %Campbell County62Clay County: 61.9 %Clay County61.9Scott County: 61.7 %Scott County61.7Jefferson County: 61.2 %Jefferson County61.2Bullitt County: 61.1 %Bullitt County61.1Meade County: 60.9 %Meade County60.9Kenton County: 60.9 %Kenton County60.9Spencer County: 60.8 %Spencer County60.8Christian County: 60.6 %Christian County60.6Perry County: 60.1 %Perry County60.1Franklin County: 60.1 %Franklin County60.1Hardin County: 60.1 %Hardin County60.1Adair County: 60 %Adair County60McCreary County: 60 %McCreary County60Pike County: 59.9 %Pike County59.9Lyon County: 59.9 %Lyon County59.9Boone County: 59.7 %Boone County59.7Leslie County: 59.7 %Leslie County59.7Powell County: 59.7 %Powell County59.7Laurel County: 59.6 %Laurel County59.6Gallatin County: 59.6 %Gallatin County59.6Anderson County: 59.6 %Anderson County59.6Boyle County: 59.6 %Boyle County59.6Clark County: 59.5 %Clark County59.5Edmonson County: 59.4 %Edmonson County59.4Shelby County: 59.3 %Shelby County59.3Montgomery County: 59.3 %Montgomery County59.3Pendleton County: 59.3 %Pendleton County59.3Simpson County: 59.2 %Simpson County59.2Trimble County: 59.2 %Trimble County59.2Johnson County: 59 %Johnson County59
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2021 (%)Change on 2020
1Rowan County65.5-0.2 pts
2Fayette County64.1-0.4 pts
3Martin County63.4-0.3 pts
4Madison County63.4-0.6 pts
5Lee County63.3+0.2 pts
6Warren County63-0 pts
7Morgan County62.9-0.7 pts
8Calloway County62.8-0.3 pts
9Elliott County62.1-0.3 pts
10Campbell County62-0.3 pts
11Clay County61.9-0 pts
12Scott County61.7-0 pts
13Jefferson County61.2-0.3 pts
14Bullitt County61.1-0.1 pts
15Meade County60.9-0.2 pts
16Kenton County60.9-0.2 pts
17Spencer County60.8-0.4 pts
18Christian County60.6-0.1 pts
19Perry County60.1-0.5 pts
20Franklin County60.1-0.2 pts
21Hardin County60.1-0.5 pts
22Adair County60+0.2 pts
23McCreary County60-0.5 pts
24Pike County59.9-0.4 pts
25Lyon County59.9-1.8 pts
26Boone County59.7-0.1 pts
27Leslie County59.7-0.6 pts
28Powell County59.7-0.1 pts
29Laurel County59.6-0.1 pts
30Gallatin County59.6-0.1 pts
31Anderson County59.6-0.4 pts
32Boyle County59.6-0.4 pts
33Clark County59.5-0.1 pts
34Edmonson County59.4-0.2 pts
35Shelby County59.3-0 pts
36Montgomery County59.3-0.1 pts
37Pendleton County59.3-0.6 pts
38Simpson County59.2-0.3 pts
39Trimble County59.2-0.1 pts
40Johnson County59-0.1 pts
41Nelson County59-0.3 pts
42Breathitt County59-0.3 pts
43Allen County59+0.2 pts
44Oldham County58.9-0.3 pts
45Knott County58.9-0.5 pts
46Marion County58.80 pts
47Jessamine County58.8-0.2 pts
48Bell County58.7-0.5 pts
49Floyd County58.6-0.4 pts
50Rockcastle County58.6-0.2 pts
51Grant County58.6-0.1 pts
52Estill County58.6-0.1 pts
53Letcher County58.5-0.3 pts
54Magoffin County58.5-0.4 pts
55Fulton County58.5+0.2 pts
56Boyd County58.4-0.3 pts
57Harrison County58.3-0.4 pts
58Taylor County58.3-0.3 pts
59Garrard County58.20 pts
60Muhlenberg County58.2-0.6 pts
61Henderson County58.2-0.3 pts
62Harlan County58.2-0.1 pts
63Jackson County58.1-0.2 pts
64Grayson County58-0.1 pts
65Henry County580 pts
66Carter County58-0.4 pts
67Knox County57.9+0.1 pts
68Daviess County57.9-0.2 pts
69Bourbon County57.90 pts
70Owen County57.8+0.1 pts
71Lawrence County57.8-0.6 pts
72Woodford County57.8-0.5 pts
73Hancock County57.8+0.5 pts
74Larue County57.7-0.2 pts
75Whitley County57.6-0.4 pts
76Mercer County57.6-0.3 pts
77Carroll County57.6-0.3 pts
78Bracken County57.6-0.4 pts
79Hopkins County57.6-0.4 pts
80McCracken County57.5-0.3 pts
81Logan County57.5-0.4 pts
82Union County57.5-0.9 pts
83Ballard County57.4-0.4 pts
84Menifee County57.4+0.2 pts
85Breckinridge County57.4+0.1 pts
86Washington County57.4-0.2 pts
87Webster County57.3-0.3 pts
88Metcalfe County57.3-0.4 pts
89Pulaski County57.3-0.2 pts
90Mason County57.3-0.2 pts
91Wayne County57.2-0.1 pts
92Bath County57.2+0.1 pts
93Fleming County57.1-0.2 pts
94Hart County57+0.1 pts
95Barren County57-0.4 pts
96Lewis County56.9-0.5 pts
97Butler County56.9-0.5 pts
98Nicholas County56.9+0.1 pts
99Monroe County56.8-0.3 pts
100Ohio County56.70 pts
101Lincoln County56.7-0.4 pts
102Marshall County56.6-0.1 pts
103Green County56.5-0.4 pts
104Todd County56.5-0.3 pts
105Russell County56.4-0.2 pts
106Greenup County56.3-0.2 pts
107Wolfe County56.3-0.3 pts
108Clinton County56.1-0.2 pts
109Graves County56-0.2 pts
110Livingston County56-0.4 pts
111Crittenden County55.9-0.3 pts
112Owsley County55.9-0.4 pts
113McLean County55.9-0.1 pts
114Caldwell County55.8-0.5 pts
115Casey County55.6-0 pts
116Carlisle County55.4+0.1 pts
117Robertson County55.2-1 pts
118Trigg County54.10 pts
119Cumberland County54.1-0.5 pts
120Hickman County53.1-0.3 pts

Other periods

About this ranking

Residents aged 18 to 64 as a percentage of total population on 1 July. United States: Census Bureau county population estimates by age; states and the nation are sums of their counties.

Not comparable with working-age shares for ages 15 to 64 used in EU and World Bank statistics.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

How to cite

U.S. Census Bureau. Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.

Citation styles

The publisher is the author. Invokely is named only as the place the figures were read, where a style asks for it.

APA 7

U.S. Census Bureau. (2026). Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties (Counties in Kentucky by population aged 18 to 64, 2021) [Data set]. Retrieved October 12, 2026, from https://www.census.gov/programs-surveys/popest/data/data-sets.html

MLA 9

Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties, Counties in Kentucky by population aged 18 to 64, 2021. U.S. Census Bureau, 25 June 2026, https://www.census.gov/programs-surveys/popest/data/data-sets.html. Invokely, https://invokely.ai/rankings/population-18-64/kentucky-counties?period=2021. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties. Counties in Kentucky by population aged 18 to 64, 2021. Dataset. Accessed October 12, 2026. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Also distributed by Invokely, https://invokely.ai/rankings/population-18-64/kentucky-counties?period=2021.

Harvard

U.S. Census Bureau (2026) Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties, Counties in Kentucky by population aged 18 to 64, 2021 [Dataset]. Available at: https://www.census.gov/programs-surveys/popest/data/data-sets.html, via Invokely: https://invokely.ai/rankings/population-18-64/kentucky-counties?period=2021 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_kentucky_by_2021,
  author = {{U.S. Census Bureau}},
  title = {{Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties: Counties in Kentucky by population aged 18 to 64, 2021}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www.census.gov/programs-surveys/popest/data/data-sets.html},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/population-18-64/kentucky-counties?period=2021. Publisher attribution: U.S. Census Bureau. Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.},
}
RIS
TY  - DATA
AU  - U.S. Census Bureau
TI  - Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties: Counties in Kentucky by population aged 18 to 64, 2021
PY  - 2026
DA  - 2026/06/25
PB  - U.S. Census Bureau
DB  - Invokely
UR  - https://www.census.gov/programs-surveys/popest/data/data-sets.html
L2  - https://invokely.ai/rankings/population-18-64/kentucky-counties?period=2021
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-18-64/kentucky-counties?period=2021.
N1  - Publisher attribution: U.S. Census Bureau. Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.
ER  -
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Questions

Which county has the highest population aged 18 to 64?

Rowan County, with 65.5% in 2021, according to the U.S. Census Bureau.

Which county has the lowest population aged 18 to 64?

Hickman County, with 53.1% in 2021.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties. Retrieved 2026-10-12.

Population aged 18 to 64: other rankings

Counties in Kentucky: more rankings