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 2024, at 64.8%. Cumberland County had the lowest, at 52.1%. The median was 57.5% and the figure for Kentucky was 59.2%. Source: the U.S. Census Bureau.

Highest64.8Rowan County
Lowest52.1Cumberland County
Median57.5120 counties
Kentucky59.2History

Top 40 counties, 2024

Rowan County: 64.8 %Rowan County64.8Fayette County: 63.6 %Fayette County63.6Madison County: 63.4 %Madison County63.4Warren County: 62.6 %Warren County62.6Martin County: 62.4 %Martin County62.4Morgan County: 62.1 %Morgan County62.1Calloway County: 61.9 %Calloway County61.9Lee County: 61.9 %Lee County61.9Scott County: 61.5 %Scott County61.5Campbell County: 61.1 %Campbell County61.1Elliott County: 60.9 %Elliott County60.9Clay County: 60.7 %Clay County60.7Meade County: 60.6 %Meade County60.6Kenton County: 60.4 %Kenton County60.4Bullitt County: 60.3 %Bullitt County60.3Jefferson County: 60.2 %Jefferson County60.2Lyon County: 60.1 %Lyon County60.1Edmonson County: 60.1 %Edmonson County60.1McCreary County: 59.8 %McCreary County59.8Spencer County: 59.5 %Spencer County59.5Franklin County: 59.3 %Franklin County59.3Powell County: 59.2 %Powell County59.2Boone County: 59.2 %Boone County59.2Gallatin County: 59.2 %Gallatin County59.2Hardin County: 59.2 %Hardin County59.2Laurel County: 59.1 %Laurel County59.1Anderson County: 59.1 %Anderson County59.1Oldham County: 59.1 %Oldham County59.1Montgomery County: 58.9 %Montgomery County58.9Shelby County: 58.8 %Shelby County58.8Clark County: 58.8 %Clark County58.8Pike County: 58.8 %Pike County58.8Boyle County: 58.8 %Boyle County58.8Perry County: 58.7 %Perry County58.7Nelson County: 58.6 %Nelson County58.6Marion County: 58.4 %Marion County58.4Estill County: 58.4 %Estill County58.4Adair County: 58.4 %Adair County58.4Simpson County: 58.4 %Simpson County58.4Pendleton County: 58.3 %Pendleton County58.3
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2024 (%)Change on 2023
1Rowan County64.80 pts
2Fayette County63.60 pts
3Madison County63.4+0.1 pts
4Warren County62.6-0.1 pts
5Martin County62.4-0.8 pts
6Morgan County62.1-0.9 pts
7Calloway County61.9+0.1 pts
8Lee County61.9-0.3 pts
9Scott County61.5-0 pts
10Campbell County61.1-0.3 pts
11Elliott County60.9-0.5 pts
12Clay County60.7-0.5 pts
13Meade County60.6-0.4 pts
14Kenton County60.4-0.1 pts
15Bullitt County60.3-0.1 pts
16Jefferson County60.2-0.2 pts
17Lyon County60.1-1.8 pts
18Edmonson County60.1+0.3 pts
19McCreary County59.8-0.5 pts
20Spencer County59.5-0.3 pts
21Franklin County59.3-0.2 pts
22Powell County59.2-0.1 pts
23Boone County59.2-0.1 pts
24Gallatin County59.2-0.1 pts
25Hardin County59.2-0.2 pts
26Laurel County59.1-0.2 pts
27Anderson County59.1-0.3 pts
28Oldham County59.1-0.3 pts
29Montgomery County58.9-0.1 pts
30Shelby County58.8-0.2 pts
31Clark County58.8-0.1 pts
32Pike County58.8-0.4 pts
33Boyle County58.8-0.4 pts
34Perry County58.7-0.6 pts
35Nelson County58.6-0.1 pts
36Marion County58.40 pts
37Estill County58.4-0.3 pts
38Adair County58.4-0.8 pts
39Simpson County58.4-0.3 pts
40Pendleton County58.3-0.1 pts
41Jessamine County58.30 pts
42Breathitt County58.2-0.1 pts
43Allen County58.2-0.1 pts
44Christian County58.2-0.2 pts
45Bell County58.2-0.1 pts
46Floyd County58.2-0.3 pts
47Boyd County58.1-0 pts
48Muhlenberg County58.1-0.2 pts
49Knott County58-0.5 pts
50Leslie County58-0.7 pts
51Rockcastle County58-0.2 pts
52Grant County580 pts
53Johnson County57.9-0.4 pts
54Owen County57.8-0 pts
55Whitley County57.8+0.1 pts
56Trimble County57.8-0.4 pts
57Taylor County57.6-0.3 pts
58Mercer County57.5-0.1 pts
59Larue County57.5+0.1 pts
60Knox County57.5-0.4 pts
61Hancock County57.5-0.2 pts
62Union County57.5+0.3 pts
63Lawrence County57.4+0.2 pts
64Garrard County57.4-0 pts
65Letcher County57.3-0.3 pts
66Magoffin County57.2-0.2 pts
67Henderson County57.2-0.4 pts
68Metcalfe County57.20 pts
69Nicholas County57.2+0.5 pts
70Ohio County57.1+0.1 pts
71Wolfe County57.1+0.2 pts
72Carter County57.1-0.3 pts
72Daviess County57.1-0.3 pts
74Bourbon County57.1-0.3 pts
75Fulton County57-0.3 pts
76Hopkins County57-0.1 pts
77Jackson County57+0.1 pts
78Harlan County56.9-0.2 pts
79Bracken County56.9+0.2 pts
80Woodford County56.9-0.4 pts
81Pulaski County56.9-0.1 pts
82Henry County56.9-0.2 pts
83McCracken County56.8-0.1 pts
84Grayson County56.8-0.5 pts
85Harrison County56.8-0.3 pts
86Carroll County56.8-0.4 pts
87Menifee County56.7-0.1 pts
88Washington County56.7+0.1 pts
89Logan County56.7-0.3 pts
90Wayne County56.6-0.1 pts
91Ballard County56.5-0.4 pts
92Lewis County56.5-0.1 pts
93Lincoln County56.4+0.1 pts
94Barren County56.4-0.3 pts
95Monroe County56.3-0.2 pts
96Hart County56.3-0.3 pts
97Butler County56.3-0.1 pts
98Mason County56.3-0.4 pts
99Breckinridge County56.2-0.7 pts
100Fleming County56.2-0.6 pts
101Bath County56.2-0.3 pts
102Todd County56.1-0.3 pts
103Greenup County56.1+0.2 pts
104Green County56-0.2 pts
105Marshall County55.9-0.2 pts
106Graves County55.90 pts
107Webster County55.9-0.4 pts
108Crittenden County55.6+0.2 pts
109Owsley County55.3-0.2 pts
110Livingston County55.3-0.2 pts
111Casey County55.3-0.2 pts
112Clinton County55.20 pts
113Russell County55.1-0.5 pts
114McLean County55.1-0.2 pts
115Carlisle County55.1+0.1 pts
116Robertson County54.6+0.2 pts
117Caldwell County54-0.4 pts
118Trigg County53.6-0.2 pts
119Hickman County52.6-0.3 pts
120Cumberland County52.1-0.7 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, 2024) [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, 2024. 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=2024. 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, 2024. 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=2024.

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, 2024 [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=2024 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_kentucky_by_2024,
  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, 2024}},
  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=2024. 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, 2024
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=2024
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-18-64/kentucky-counties?period=2024.
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 64.8% in 2024, according to the U.S. Census Bureau.

Which county has the lowest population aged 18 to 64?

Cumberland County, with 52.1% in 2024.

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