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 2020, at 65.7%. Hickman County had the lowest, at 53.4%. The median was 58.4% and the figure for Kentucky was 60.2%. Source: the U.S. Census Bureau.

Highest65.7Rowan County
Lowest53.4Hickman County
Median58.4120 counties
Kentucky60.2History

Top 40 counties, 2020

Rowan County: 65.7 %Rowan County65.7Fayette County: 64.5 %Fayette County64.5Madison County: 64 %Madison County64Martin County: 63.7 %Martin County63.7Morgan County: 63.6 %Morgan County63.6Lee County: 63.1 %Lee County63.1Calloway County: 63.1 %Calloway County63.1Warren County: 63 %Warren County63Elliott County: 62.5 %Elliott County62.5Campbell County: 62.3 %Campbell County62.3Clay County: 61.9 %Clay County61.9Scott County: 61.8 %Scott County61.8Lyon County: 61.7 %Lyon County61.7Jefferson County: 61.5 %Jefferson County61.5Bullitt County: 61.2 %Bullitt County61.2Meade County: 61.2 %Meade County61.2Spencer County: 61.1 %Spencer County61.1Kenton County: 61.1 %Kenton County61.1Perry County: 60.6 %Perry County60.6Christian County: 60.6 %Christian County60.6Hardin County: 60.6 %Hardin County60.6McCreary County: 60.5 %McCreary County60.5Franklin County: 60.3 %Franklin County60.3Leslie County: 60.2 %Leslie County60.2Pike County: 60.2 %Pike County60.2Boyle County: 60 %Boyle County60Anderson County: 59.9 %Anderson County59.9Pendleton County: 59.9 %Pendleton County59.9Adair County: 59.9 %Adair County59.9Boone County: 59.8 %Boone County59.8Gallatin County: 59.7 %Gallatin County59.7Powell County: 59.7 %Powell County59.7Laurel County: 59.7 %Laurel County59.7Edmonson County: 59.6 %Edmonson County59.6Clark County: 59.5 %Clark County59.5Simpson County: 59.5 %Simpson County59.5Montgomery County: 59.4 %Montgomery County59.4Knott County: 59.4 %Knott County59.4Trimble County: 59.3 %Trimble County59.3Shelby County: 59.3 %Shelby County59.3
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2020 (%)Change on 2019
1Rowan County65.7-0.4 pts
2Fayette County64.5-0.5 pts
3Madison County64-0.3 pts
4Martin County63.7-0.1 pts
5Morgan County63.6-0.1 pts
6Lee County63.1+0.3 pts
7Calloway County63.1-0.1 pts
8Warren County63-0.4 pts
9Elliott County62.5-0 pts
10Campbell County62.3-0.5 pts
11Clay County61.9-0.6 pts
12Scott County61.8+0.1 pts
13Lyon County61.7-0.3 pts
14Jefferson County61.5-0.5 pts
15Bullitt County61.20 pts
16Meade County61.2+0.2 pts
17Spencer County61.1-0.3 pts
18Kenton County61.1-0.1 pts
19Perry County60.6-0.7 pts
20Christian County60.6-0.6 pts
21Hardin County60.6-0.6 pts
22McCreary County60.5-0.8 pts
23Franklin County60.3-0.4 pts
24Leslie County60.2-0.3 pts
25Pike County60.2-0.5 pts
26Boyle County60-0.6 pts
27Anderson County59.90 pts
28Pendleton County59.9-0.5 pts
29Adair County59.9-0.2 pts
30Boone County59.8-0.2 pts
31Gallatin County59.7-0.3 pts
32Powell County59.7-0.5 pts
33Laurel County59.7-0.3 pts
34Edmonson County59.6+0.5 pts
35Clark County59.5-0.6 pts
36Simpson County59.5-0.2 pts
37Montgomery County59.4-0.4 pts
38Knott County59.4-0.9 pts
39Trimble County59.3-0.6 pts
40Shelby County59.3-0.4 pts
41Nelson County59.3-0.4 pts
42Breathitt County59.3-1 pts
43Bell County59.2-0.9 pts
44Oldham County59.2-0.3 pts
45Johnson County59.1-0.5 pts
46Floyd County59-1 pts
47Jessamine County59-0.5 pts
48Magoffin County58.9-1.2 pts
49Muhlenberg County58.9-0.4 pts
50Letcher County58.8-0.8 pts
51Rockcastle County58.8-0.4 pts
52Marion County58.8-0.3 pts
53Allen County58.7-0.2 pts
54Boyd County58.7-0.7 pts
55Harrison County58.7-0.7 pts
56Estill County58.7+0.1 pts
57Grant County58.7-0.8 pts
58Taylor County58.6-0.5 pts
59Henderson County58.5-0.5 pts
60Union County58.40 pts
61Carter County58.4-0.5 pts
62Lawrence County58.4-1 pts
63Jackson County58.3-0.8 pts
64Harlan County58.3-0.7 pts
65Fulton County58.3-0.6 pts
66Woodford County58.3-0.6 pts
67Garrard County58.2-0.3 pts
68Grayson County58.1-0.8 pts
69Daviess County58.1-0.5 pts
70Whitley County58.1-0.8 pts
71Henry County58-0.8 pts
72Mercer County58-0.7 pts
73Bracken County57.9-0.3 pts
74Hopkins County57.9-0.3 pts
75Larue County57.9-0.2 pts
76Carroll County57.9-0.9 pts
77Logan County57.9-0.5 pts
78Ballard County57.9+0.4 pts
79Knox County57.9-0.8 pts
80Bourbon County57.8-0.4 pts
81McCracken County57.8-0.4 pts
82Owen County57.7-0.2 pts
83Metcalfe County57.7+0.1 pts
84Washington County57.6-0.6 pts
85Webster County57.6-1 pts
86Mason County57.5-0.7 pts
87Pulaski County57.5-0.4 pts
88Barren County57.4-0.5 pts
89Lewis County57.4-1 pts
90Butler County57.3-0.4 pts
91Breckinridge County57.3-0.2 pts
92Hancock County57.3-0.6 pts
93Fleming County57.3-0.7 pts
94Wayne County57.2-0.4 pts
95Menifee County57.2+0.5 pts
96Monroe County57.1-0.4 pts
97Lincoln County57.1-0.7 pts
98Bath County57-0.3 pts
99Hart County56.9-0.4 pts
100Green County56.9-0.5 pts
101Todd County56.8-0.4 pts
102Nicholas County56.7-0.6 pts
103Marshall County56.7-0.4 pts
104Ohio County56.7-0.3 pts
105Wolfe County56.6-0.5 pts
106Russell County56.6-0.7 pts
107Greenup County56.5-0.5 pts
108Livingston County56.3-1.3 pts
109Caldwell County56.3-0.4 pts
109Owsley County56.3-0.7 pts
111Clinton County56.3-0.4 pts
112Crittenden County56.3-0.7 pts
113Graves County56.2-0.4 pts
114Robertson County56.1+0.5 pts
115McLean County56-0.3 pts
116Casey County55.7-0.7 pts
117Carlisle County55.3-0.3 pts
118Cumberland County54.6-1 pts
119Trigg County54.1-0.9 pts
120Hickman County53.4-0.1 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, 2020) [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, 2020. 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=2020. 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, 2020. 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=2020.

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, 2020 [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=2020 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_kentucky_by_2020,
  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, 2020}},
  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=2020. 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, 2020
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=2020
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-18-64/kentucky-counties?period=2020.
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 65.7% in 2020, according to the U.S. Census Bureau.

Which county has the lowest population aged 18 to 64?

Hickman County, with 53.4% in 2020.

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