Data / Rankings / Population under 18 / Counties in Kentucky

Counties in Kentucky by population under 18, 2025

Christian County had the highest population under 18 of 120 counties in 2025, at 27.6%. Lyon County had the lowest, at 14.1%. The median was 22.1% and the figure for Kentucky was 22.1%. Source: the U.S. Census Bureau.

Highest27.6Christian County
Lowest14.1Lyon County
Median22.1120 counties
Kentucky22.1History

Top 40 counties, 2025

Christian County: 27.6 %Christian County27.6Todd County: 27.2 %Todd County27.2Grant County: 25.9 %Grant County25.9Carroll County: 25.7 %Carroll County25.7Bath County: 25.2 %Bath County25.2Nicholas County: 24.9 %Nicholas County24.9Hart County: 24.7 %Hart County24.7Whitley County: 24.7 %Whitley County24.7Boone County: 24.5 %Boone County24.5Webster County: 24.4 %Webster County24.4Fleming County: 24.2 %Fleming County24.2Monroe County: 24 %Monroe County24Hardin County: 24 %Hardin County24Barren County: 23.9 %Barren County23.9Oldham County: 23.9 %Oldham County23.9Graves County: 23.9 %Graves County23.9Logan County: 23.8 %Logan County23.8Butler County: 23.8 %Butler County23.8Scott County: 23.8 %Scott County23.8Daviess County: 23.7 %Daviess County23.7Wolfe County: 23.6 %Wolfe County23.6Jessamine County: 23.6 %Jessamine County23.6Gallatin County: 23.6 %Gallatin County23.6Lincoln County: 23.5 %Lincoln County23.5Jackson County: 23.5 %Jackson County23.5Casey County: 23.4 %Casey County23.4Simpson County: 23.4 %Simpson County23.4Lewis County: 23.4 %Lewis County23.4Carlisle County: 23.4 %Carlisle County23.4Owsley County: 23.3 %Owsley County23.3Grayson County: 23.3 %Grayson County23.3Warren County: 23.2 %Warren County23.2Metcalfe County: 23.1 %Metcalfe County23.1Taylor County: 23.1 %Taylor County23.1Washington County: 23 %Washington County23Allen County: 23 %Allen County23Montgomery County: 23 %Montgomery County23Lawrence County: 22.9 %Lawrence County22.9Harrison County: 22.9 %Harrison County22.9Knox County: 22.8 %Knox County22.8
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2025 (%)Change on 2024
1Christian County27.6-0.3 pts
2Todd County27.2+0.2 pts
3Grant County25.9-0.1 pts
4Carroll County25.7-0.1 pts
5Bath County25.2-0.1 pts
6Nicholas County24.9+0.1 pts
7Hart County24.7+0.1 pts
8Whitley County24.7-0.2 pts
9Boone County24.5-0.5 pts
10Webster County24.40 pts
11Fleming County24.2-0.2 pts
12Monroe County24+0.5 pts
13Hardin County24-0.1 pts
14Barren County23.9-0.1 pts
15Oldham County23.9-0.6 pts
16Graves County23.9-0.3 pts
17Logan County23.8-0.1 pts
18Butler County23.8-0.2 pts
19Scott County23.8-0.3 pts
20Daviess County23.7-0.1 pts
21Wolfe County23.6+0.1 pts
22Jessamine County23.6-0.4 pts
23Gallatin County23.6-0 pts
24Lincoln County23.5-0.3 pts
25Jackson County23.5+0.1 pts
26Casey County23.4-0.2 pts
27Simpson County23.4+0.2 pts
28Lewis County23.4-0.2 pts
29Carlisle County23.4-0.1 pts
30Owsley County23.3+0.5 pts
31Grayson County23.3-0 pts
32Warren County23.2-0.1 pts
33Metcalfe County23.1+0.1 pts
34Taylor County23.1-0 pts
35Washington County23+0.1 pts
36Allen County23-0.3 pts
37Montgomery County23-0.3 pts
38Lawrence County22.9-0.1 pts
39Harrison County22.90 pts
40Knox County22.8-0.4 pts
41Cumberland County22.7-0.1 pts
42Henry County22.7-0.1 pts
43Spencer County22.7-0.4 pts
44Bracken County22.6-0.7 pts
45Garrard County22.6-0.1 pts
46Shelby County22.6-0.2 pts
47Harlan County22.6-0.2 pts
48Clinton County22.6-0.1 pts
49Breckinridge County22.6-0.1 pts
50Mason County22.50 pts
51Russell County22.5-0.4 pts
52Meade County22.4-0.4 pts
53Kenton County22.4-0.3 pts
54Powell County22.4-0.3 pts
55Bell County22.4+0.2 pts
56Marion County22.3-0.4 pts
57Ohio County22.2-0.5 pts
58McLean County22.1-0.3 pts
59Owen County22.1-0.2 pts
60Hopkins County22.1-0.1 pts
61Trigg County22.1-0.1 pts
62Nelson County22.1-0.4 pts
63Caldwell County22-0.5 pts
64Anderson County22-0.5 pts
65Hancock County22-0.2 pts
66McCreary County22-0.3 pts
67Perry County22-0.1 pts
68Laurel County21.9-0.3 pts
69Pendleton County21.9-0.4 pts
70Larue County21.9-0.4 pts
71Bourbon County21.9-0.6 pts
72Henderson County21.8-0.2 pts
73Carter County21.8-0.2 pts
74Clark County21.8-0.2 pts
75Pulaski County21.7-0 pts
76Menifee County21.7-0.2 pts
77Green County21.7+0.1 pts
78Jefferson County21.6-0.1 pts
79Mercer County21.50 pts
80Magoffin County21.5-0 pts
81Robertson County21.5-0.6 pts
82Union County21.5-0 pts
83Breathitt County21.4-0.4 pts
84Clay County21.4-0.1 pts
85Trimble County21.3-0.2 pts
86Crittenden County21.3-0.9 pts
87Rockcastle County21.3-0.3 pts
88Bullitt County21.2-0.3 pts
89Johnson County21.2-0.3 pts
90Floyd County21.2-0.4 pts
91Adair County21.2-0.3 pts
92Woodford County21.1-0.1 pts
93Letcher County21-0.2 pts
94Boyd County21-0.2 pts
95Wayne County20.9-0.3 pts
96Muhlenberg County20.9-0.1 pts
97Ballard County20.9+0.5 pts
98McCracken County20.7-0.4 pts
99Hickman County20.6-0.3 pts
100Greenup County20.6-0.4 pts
101Estill County20.5-0.4 pts
102Leslie County20.5-0.4 pts
103Franklin County20.4-0.4 pts
104Madison County20.4-0.3 pts
105Boyle County20.3-0.1 pts
106Fayette County20.3-0.2 pts
107Campbell County19.9-0.3 pts
108Fulton County19.8-0.6 pts
109Pike County19.7-0.2 pts
110Knott County19.6-0.5 pts
111Livingston County19.5-0.5 pts
112Edmonson County19.4-0.1 pts
113Marshall County19.2-0.3 pts
114Morgan County19-0.5 pts
115Rowan County18.7-0.5 pts
116Martin County18.4-0.5 pts
117Calloway County18.4-0.3 pts
118Lee County18.2+0.2 pts
119Elliott County17.3-0.4 pts
120Lyon County14.1+0.1 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.

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?

Christian County, with 27.6% in 2025, according to the U.S. Census Bureau.

Which county has the lowest population under 18?

Lyon County, with 14.1% in 2025.

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