Data / Rankings / Population under 18 / Counties in Kentucky

Counties in Kentucky by population under 18

Grant County had the highest population under 18 of 120 counties in 2016, at 27.3%. Lyon County had the lowest, at 13.7%. The median was 22.9% and the figure for Kentucky was 23%. Source: the U.S. Census Bureau.

Keep it in a collection in your library.
Highest27.3Grant County
Lowest13.7Lyon County
Median22.9120 counties
Kentucky23History

Map of counties, 2016

Adair County: 21.7 %Allen County: 24.2 %Anderson County: 24.1 %Ballard County: 21.9 %Barren County: 23.9 %Bath County: 25.5 %Bell County: 21.3 %Boone County: 27.1 %Bourbon County: 22.9 %Boyd County: 21.4 %Boyle County: 20.6 %Bracken County: 24.8 %Breathitt County: 21.6 %Breckinridge County: 23.6 %Bullitt County: 23.8 %Butler County: 23.3 %Caldwell County: 21.8 %Calloway County: 18.2 %Campbell County: 21.5 %Carlisle County: 22.4 %Carroll County: 25.5 %Carter County: 22.2 %Casey County: 23.5 %Christian County: 26.7 %Clark County: 22.7 %Clay County: 21.8 %Clinton County: 23.9 %Crittenden County: 23.3 %Cumberland County: 21.8 %Daviess County: 24.3 %Edmonson County: 21.4 %Elliott County: 20 %Estill County: 22 %Fayette County: 21.5 %Fleming County: 24.4 %Floyd County: 21.7 %Franklin County: 21.3 %Fulton County: 19.9 %Gallatin County: 26 %Garrard County: 23.2 %Grant County: 27.3 %Graves County: 24.4 %Grayson County: 23.5 %Green County: 21.9 %Greenup County: 22.2 %Hancock County: 25 %Hardin County: 24.5 %Harlan County: 22 %Harrison County: 23.1 %Hart County: 24.9 %Henderson County: 23.4 %Henry County: 23.6 %Hickman County: 21.5 %Hopkins County: 22.8 %Jackson County: 22.9 %Jefferson County: 22.3 %Jessamine County: 25.5 %Johnson County: 22.2 %Kenton County: 24.5 %Knott County: 21.3 %Knox County: 23.5 %Larue County: 23 %Laurel County: 23.4 %Lawrence County: 23.2 %Lee County: 20 %Leslie County: 21.5 %Letcher County: 21.6 %Lewis County: 23.2 %Lincoln County: 23 %Livingston County: 20.2 %Logan County: 23.8 %Lyon County: 13.7 %McCracken County: 21.9 %McCreary County: 22.5 %McLean County: 23.3 %Madison County: 21.4 %Magoffin County: 22.5 %Marion County: 24.3 %Marshall County: 20.9 %Martin County: 20.3 %Mason County: 23.2 %Meade County: 25.2 %Menifee County: 22.7 %Mercer County: 22.1 %Metcalfe County: 23.9 %Monroe County: 22.9 %Montgomery County: 24 %Morgan County: 20.5 %Muhlenberg County: 21.4 %Nelson County: 24.4 %Nicholas County: 24 %Ohio County: 24.7 %Oldham County: 26.6 %Owen County: 24.2 %Owsley County: 21.3 %Pendleton County: 23.4 %Perry County: 21.7 %Pike County: 20.8 %Powell County: 23.7 %Pulaski County: 22.4 %Robertson County: 21.6 %Rockcastle County: 22.2 %Rowan County: 19 %Russell County: 22.7 %Scott County: 26.1 %Shelby County: 25 %Simpson County: 24.2 %Spencer County: 24.2 %Taylor County: 22.4 %Todd County: 27.1 %Trigg County: 22 %Trimble County: 22.5 %Union County: 22.6 %Warren County: 23 %Washington County: 22.9 %Wayne County: 22.6 %Webster County: 22.9 %Whitley County: 24 %Wolfe County: 23.4 %Woodford County: 22.9 %
  • Under 21
  • 21 to 22
  • 22 to 23
  • 23 to 24
  • 24 and over
%, 2016. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2016

Grant County: 27.3 %Grant County27.3Todd County: 27.1 %Todd County27.1Boone County: 27.1 %Boone County27.1Christian County: 26.7 %Christian County26.7Oldham County: 26.6 %Oldham County26.6Scott County: 26.1 %Scott County26.1Gallatin County: 26 %Gallatin County26Jessamine County: 25.5 %Jessamine County25.5Carroll County: 25.5 %Carroll County25.5Bath County: 25.5 %Bath County25.5Meade County: 25.2 %Meade County25.2Shelby County: 25 %Shelby County25Hancock County: 25 %Hancock County25Hart County: 24.9 %Hart County24.9Bracken County: 24.8 %Bracken County24.8Ohio County: 24.7 %Ohio County24.7Hardin County: 24.5 %Hardin County24.5Kenton County: 24.5 %Kenton County24.5Fleming County: 24.4 %Fleming County24.4Graves County: 24.4 %Graves County24.4Nelson County: 24.4 %Nelson County24.4Marion County: 24.3 %Marion County24.3Daviess County: 24.3 %Daviess County24.3Owen County: 24.2 %Owen County24.2Spencer County: 24.2 %Spencer County24.2Simpson County: 24.2 %Simpson County24.2Allen County: 24.2 %Allen County24.2Anderson County: 24.1 %Anderson County24.1Montgomery County: 24 %Montgomery County24Nicholas County: 24 %Nicholas County24Whitley County: 24 %Whitley County24Metcalfe County: 23.9 %Metcalfe County23.9Barren County: 23.9 %Barren County23.9Clinton County: 23.9 %Clinton County23.9Bullitt County: 23.8 %Bullitt County23.8Logan County: 23.8 %Logan County23.8Powell County: 23.7 %Powell County23.7Breckinridge County: 23.6 %Breckinridge County23.6Henry County: 23.6 %Henry County23.6Knox County: 23.5 %Knox County23.5Grant County: 27.3 %Grant County27.3Todd County: 27.1 %Todd County27.1Boone County: 27.1 %Boone County27.1Christian County: 26.7 %Christian County26.7Oldham County: 26.6 %Oldham County26.6Scott County: 26.1 %Scott County26.1Gallatin County: 26 %Gallatin County26Jessamine County: 25.5 %Jessamine County25.5Carroll County: 25.5 %Carroll County25.5Bath County: 25.5 %Bath County25.5Meade County: 25.2 %Meade County25.2Shelby County: 25 %Shelby County25Hancock County: 25 %Hancock County25Hart County: 24.9 %Hart County24.9Bracken County: 24.8 %Bracken County24.8Ohio County: 24.7 %Ohio County24.7Hardin County: 24.5 %Hardin County24.5Kenton County: 24.5 %Kenton County24.5Fleming County: 24.4 %Fleming County24.4Graves County: 24.4 %Graves County24.4Nelson County: 24.4 %Nelson County24.4Marion County: 24.3 %Marion County24.3Daviess County: 24.3 %Daviess County24.3Owen County: 24.2 %Owen County24.2Spencer County: 24.2 %Spencer County24.2Simpson County: 24.2 %Simpson County24.2Allen County: 24.2 %Allen County24.2Anderson County: 24.1 %Anderson County24.1Montgomery County: 24 %Montgomery County24Nicholas County: 24 %Nicholas County24Whitley County: 24 %Whitley County24Metcalfe County: 23.9 %Metcalfe County23.9Barren County: 23.9 %Barren County23.9Clinton County: 23.9 %Clinton County23.9Bullitt County: 23.8 %Bullitt County23.8Logan County: 23.8 %Logan County23.8Powell County: 23.7 %Powell County23.7Breckinridge County: 23.6 %Breckinridge County23.6Henry County: 23.6 %Henry County23.6Knox County: 23.5 %Knox County23.5
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2016 (%)Change on 2015
1Grant County27.3+0.2 pts
2Todd County27.1-0.1 pts
3Boone County27.1-0.3 pts
4Christian County26.7-0.4 pts
5Oldham County26.6+0.1 pts
6Scott County26.1-0.1 pts
7Gallatin County26+0.6 pts
8Jessamine County25.5-0 pts
9Carroll County25.5+0.4 pts
10Bath County25.5+0.3 pts
11Meade County25.2-0.2 pts
12Shelby County25-0 pts
13Hancock County25+0.3 pts
14Hart County24.9-0 pts
15Bracken County24.8+0.2 pts
16Ohio County24.7+0.1 pts
17Hardin County24.5-0.1 pts
18Kenton County24.5-0.2 pts
19Fleming County24.4+0.1 pts
20Graves County24.4-0.1 pts
21Nelson County24.4-0.4 pts
22Marion County24.3-0.3 pts
23Daviess County24.3-0 pts
24Owen County24.2-0.3 pts
24Spencer County24.2-0.3 pts
26Simpson County24.2-0.2 pts
27Allen County24.2-0.1 pts
28Anderson County24.10 pts
29Montgomery County24-0.3 pts
30Nicholas County24+0.5 pts
31Whitley County24-0 pts
32Metcalfe County23.9+0.3 pts
33Barren County23.90 pts
34Clinton County23.90 pts
35Bullitt County23.8-0.1 pts
36Logan County23.8-0.2 pts
37Powell County23.7+0.1 pts
38Breckinridge County23.6+0.2 pts
39Henry County23.6+0.3 pts
40Knox County23.5-0.1 pts
41Casey County23.5+0.4 pts
42Grayson County23.5-0.3 pts
43Laurel County23.4-0.2 pts
44Wolfe County23.4+0.1 pts
45Pendleton County23.4+0.5 pts
46Henderson County23.4-0 pts
47Butler County23.3-0.3 pts
47Crittenden County23.30 pts
49McLean County23.3+0.2 pts
50Lawrence County23.2+0.3 pts
51Garrard County23.2+0.3 pts
52Mason County23.2+0.1 pts
53Lewis County23.2-0.3 pts
54Harrison County23.1-0.1 pts
55Warren County23+0.2 pts
56Lincoln County23-0.4 pts
57Larue County23-0 pts
58Monroe County22.9+0.2 pts
59Washington County22.9-0.2 pts
60Webster County22.9+0.2 pts
61Jackson County22.90 pts
62Bourbon County22.9-0.1 pts
63Woodford County22.9+0.2 pts
64Hopkins County22.80 pts
65Menifee County22.7+0.5 pts
66Clark County22.7-0.1 pts
66Russell County22.7+0.4 pts
68Union County22.6+0.1 pts
69Wayne County22.60 pts
70Trimble County22.5-0.3 pts
71McCreary County22.5+0.3 pts
72Magoffin County22.5-0 pts
73Pulaski County22.4-0.2 pts
74Carlisle County22.4+0.2 pts
75Taylor County22.4+0.3 pts
76Jefferson County22.3-0.2 pts
77Rockcastle County22.20 pts
78Greenup County22.2-0 pts
79Carter County22.2-0.1 pts
80Johnson County22.2-0.3 pts
81Mercer County22.1-0.1 pts
82Estill County22-0 pts
83Trigg County22+0.3 pts
84Harlan County22-0.1 pts
85Green County21.90 pts
86McCracken County21.9+0.2 pts
87Ballard County21.9-0.5 pts
88Caldwell County21.8-0.2 pts
89Cumberland County21.8+0.2 pts
90Clay County21.8+0.4 pts
91Floyd County21.7-0.1 pts
91Perry County21.7+0.3 pts
93Adair County21.7-0.1 pts
94Breathitt County21.60 pts
95Robertson County21.6+0.4 pts
96Letcher County21.6+0.2 pts
97Leslie County21.5-0.4 pts
98Campbell County21.5-0.4 pts
99Hickman County21.5+0.2 pts
100Fayette County21.5+0.1 pts
101Muhlenberg County21.40 pts
102Edmonson County21.4+0.3 pts
103Madison County21.40 pts
104Boyd County21.4+0.1 pts
105Knott County21.3+0.3 pts
106Franklin County21.30 pts
107Bell County21.3+0.2 pts
108Owsley County21.3+0.2 pts
109Marshall County20.9+0.2 pts
110Pike County20.8-0.1 pts
111Boyle County20.6+0.1 pts
112Morgan County20.5+0.2 pts
113Martin County20.3-0.4 pts
114Livingston County20.2-0.4 pts
115Elliott County200 pts
116Lee County20-0 pts
117Fulton County19.9-0.6 pts
118Rowan County19-0.2 pts
119Calloway County18.2-0.1 pts
120Lyon County13.7-0.3 pts

Other periods

About this ranking

Residents aged 0 to 17 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.

Uses the US age of majority. Not comparable with population_0_14_share, which stops at 14.

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 0 to 17 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 0 to 17 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 under 18, 2016) [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 0 to 17 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 under 18, 2016. U.S. Census Bureau, 25 June 2026, https://www.census.gov/programs-surveys/popest/data/data-sets.html. Invokely, https://invokely.ai/rankings/population-under-18/kentucky-counties?period=2016. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. Population Estimates Program, county population by age and sex: residents aged 0 to 17 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 under 18, 2016. 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-under-18/kentucky-counties?period=2016.

Harvard

U.S. Census Bureau (2026) Population Estimates Program, county population by age and sex: residents aged 0 to 17 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 under 18, 2016 [Dataset]. Available at: https://www.census.gov/programs-surveys/popest/data/data-sets.html, via Invokely: https://invokely.ai/rankings/population-under-18/kentucky-counties?period=2016 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_kentucky_by_2016,
  author = {{U.S. Census Bureau}},
  title = {{Population Estimates Program, county population by age and sex: residents aged 0 to 17 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 under 18, 2016}},
  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-under-18/kentucky-counties?period=2016. Publisher attribution: U.S. Census Bureau. Population Estimates Program, county population by age and sex: residents aged 0 to 17 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 0 to 17 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 under 18, 2016
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-under-18/kentucky-counties?period=2016
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-under-18/kentucky-counties?period=2016.
N1  - Publisher attribution: U.S. Census Bureau. Population Estimates Program, county population by age and sex: residents aged 0 to 17 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  -
Embed this chart

Paste this code into a web page or a blog post. The chart shows the latest figures as they are published, with the source and a link back to this page.

Sites that read oEmbed links, such as WordPress, can show the chart when you paste the link to this page.

Use this data in your AI agent

Invokely serves this figure to AI assistants through MCP and to code through a REST API, with the source and citation attached. Ask your assistant:

Rank Counties in Kentucky by population under 18 using official data, and cite the source.
rank_places {"indicator":"population_0_17_share","level":"province","within":"Kentucky","limit":10}
GET https://invokely.ai/api/v1/rank?indicator=population_0_17_share&level=province&within=Kentucky&limit=10

Connect Claude, ChatGPT or Cursor in one step. The trial answers 25 calls a day without an account.

Questions

Which county has the highest population under 18?

Grant County, with 27.3% in 2016, according to the U.S. Census Bureau.

Which county has the lowest population under 18?

Lyon County, with 13.7% in 2016.

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 0 to 17 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 under 18: other rankings

Counties in Kentucky: more rankings