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 2018, at 66.4%. Hickman County had the lowest, at 53.8%. The median was 59.4% and the figure for Kentucky was 60.9%. Source: the U.S. Census Bureau.

Highest66.4Rowan County
Lowest53.8Hickman County
Median59.4120 counties
Kentucky60.9History

Top 40 counties, 2018

Rowan County: 66.4 %Rowan County66.4Fayette County: 65.4 %Fayette County65.4Madison County: 64.8 %Madison County64.8Morgan County: 64.1 %Morgan County64.1Martin County: 64 %Martin County64Warren County: 63.9 %Warren County63.9Calloway County: 63.6 %Calloway County63.6Campbell County: 63.4 %Campbell County63.4Clay County: 62.8 %Clay County62.8Elliott County: 62.5 %Elliott County62.5Lyon County: 62.3 %Lyon County62.3Jefferson County: 62.2 %Jefferson County62.2Scott County: 62 %Scott County62Lee County: 62 %Lee County62Spencer County: 61.7 %Spencer County61.7Meade County: 61.6 %Meade County61.6Bullitt County: 61.6 %Bullitt County61.6McCreary County: 61.6 %McCreary County61.6Perry County: 61.6 %Perry County61.6Christian County: 61.4 %Christian County61.4Kenton County: 61.4 %Kenton County61.4Hardin County: 61.4 %Hardin County61.4Pike County: 61.2 %Pike County61.2Knott County: 61 %Knott County61Breathitt County: 61 %Breathitt County61Franklin County: 61 %Franklin County61Leslie County: 60.9 %Leslie County60.9Pendleton County: 60.9 %Pendleton County60.9Boyle County: 60.8 %Boyle County60.8Magoffin County: 60.6 %Magoffin County60.6Powell County: 60.5 %Powell County60.5Anderson County: 60.4 %Anderson County60.4Floyd County: 60.4 %Floyd County60.4Bell County: 60.3 %Bell County60.3Clark County: 60.3 %Clark County60.3Laurel County: 60.3 %Laurel County60.3Boone County: 60.2 %Boone County60.2Nelson County: 60.1 %Nelson County60.1Johnson County: 60.1 %Johnson County60.1Trimble County: 60 %Trimble County60
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2018 (%)Change on 2017
1Rowan County66.4-0.7 pts
2Fayette County65.4-0.4 pts
3Madison County64.8-0.2 pts
4Morgan County64.1-0 pts
5Martin County64-0.3 pts
6Warren County63.9-0.5 pts
7Calloway County63.6-0.5 pts
8Campbell County63.4-0.4 pts
9Clay County62.8-0.4 pts
10Elliott County62.5-0.6 pts
11Lyon County62.3-0.1 pts
12Jefferson County62.2-0.2 pts
13Scott County62-0.1 pts
14Lee County62+0.6 pts
15Spencer County61.7-0.4 pts
16Meade County61.6-0.1 pts
17Bullitt County61.6-0.2 pts
18McCreary County61.6-0.6 pts
19Perry County61.6-0.5 pts
20Christian County61.4-0.4 pts
21Kenton County61.4-0.3 pts
22Hardin County61.4-0.4 pts
23Pike County61.2-0.5 pts
24Knott County61-0.5 pts
25Breathitt County61-0.8 pts
26Franklin County61-0.4 pts
27Leslie County60.9-0.3 pts
28Pendleton County60.9-0.5 pts
29Boyle County60.8-0.2 pts
30Magoffin County60.6-0.3 pts
31Powell County60.5-0.2 pts
32Anderson County60.4+0.2 pts
33Floyd County60.4-0.4 pts
34Bell County60.3-0.5 pts
35Clark County60.3-0.2 pts
36Laurel County60.3-0.2 pts
37Boone County60.2-0.2 pts
38Nelson County60.1-0.3 pts
39Johnson County60.1-0.5 pts
40Trimble County60-0.5 pts
41Montgomery County60-0.1 pts
42Letcher County60-0.5 pts
43Harrison County60+0.4 pts
44Jessamine County60-0.2 pts
45Adair County59.9-0.3 pts
46Oldham County59.9-0.7 pts
47Shelby County59.8-0.2 pts
48Boyd County59.8-0.4 pts
49Lawrence County59.8-0.1 pts
50Gallatin County59.7-0 pts
51Simpson County59.7+0.2 pts
52Jackson County59.7-0.1 pts
53Muhlenberg County59.6-0.2 pts
54Union County59.6-0.8 pts
55Harlan County59.5-0.6 pts
56Grant County59.5-0.2 pts
57Edmonson County59.4+0.1 pts
58Fulton County59.4-0.9 pts
59Taylor County59.4-0.2 pts
60Marion County59.4-0.2 pts
61Rockcastle County59.4-0.3 pts
62Henderson County59.3-0.5 pts
63Allen County59.3+0.2 pts
64Carroll County59.2-0.2 pts
65Webster County59.2-0.6 pts
65Woodford County59.2-0.5 pts
67Whitley County59.2-0.1 pts
68Carter County59.1-0.4 pts
69Garrard County59.1-0.3 pts
70Bracken County59.1-0 pts
71Estill County59-0.5 pts
72Mercer County59-0.1 pts
73Daviess County58.9-0.2 pts
74Knox County58.9-0.4 pts
75Grayson County58.9-0.2 pts
76Lewis County58.8-0.4 pts
77Henry County58.8-0.3 pts
78Hopkins County58.8-0.3 pts
79Larue County58.7-0.2 pts
80Bourbon County58.6-0.5 pts
81Logan County58.6+0.1 pts
82McCracken County58.5-0.5 pts
83Owen County58.4-0.2 pts
84Mason County58.4-0.2 pts
85Washington County58.3-0.2 pts
86Barren County58.3-0.2 pts
87Wayne County58.3-0.4 pts
88Lincoln County58.1-0.6 pts
89Ballard County58.10 pts
90Fleming County58.1-0.2 pts
91Pulaski County58.1-0.3 pts
92Metcalfe County58.1+0.1 pts
93Butler County58-0.5 pts
94Livingston County57.9-0 pts
95Hancock County57.9-0.1 pts
96Breckinridge County57.8+0.1 pts
97Monroe County57.8-0.4 pts
98Nicholas County57.7-0.4 pts
99Bath County57.7-0.5 pts
100Hart County57.6-0.3 pts
101Owsley County57.6-1.3 pts
102Menifee County57.6-0.6 pts
103Wolfe County57.6-0.3 pts
104Green County57.6-0.3 pts
105Russell County57.5-0.4 pts
106Greenup County57.3-0.4 pts
107Graves County57.3-0.2 pts
108Marshall County57.3-0.4 pts
109Todd County57.3-0.3 pts
110Crittenden County57.2-0.3 pts
111Caldwell County57.2-0.2 pts
112Ohio County57.2-0.3 pts
113Clinton County56.8-0.4 pts
114Casey County56.6-0.6 pts
115Robertson County56.4-0 pts
116McLean County56.2-0.8 pts
117Carlisle County55.8-0.4 pts
118Cumberland County55.8-0.9 pts
119Trigg County55.5-0.2 pts
120Hickman County53.80 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, 2018) [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, 2018. 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=2018. 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, 2018. 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=2018.

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, 2018 [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=2018 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_kentucky_by_2018,
  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, 2018}},
  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=2018. 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, 2018
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=2018
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-18-64/kentucky-counties?period=2018.
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 66.4% in 2018, according to the U.S. Census Bureau.

Which county has the lowest population aged 18 to 64?

Hickman County, with 53.8% in 2018.

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