Kentucky Population By Age Group and Age Cohort in 2021 (ACS-5Yrs)

Updated on February 28, 2025.

Based on the US Census ACS-5Yrs estimates, in 2021, among the 4.49M Kentucky population, the 55-59yrs age group constituted the highest percentage of the total population (6.87%), followed by the 25-29yrs age group (6.67%), and the 20-24yrs age group (6.64%).

In the case of age cohorts, Adults (18-64yrs) constituted the highest percentage of the total population (60.91%), followed by Children (0-17yrs) (22.74%), and Seniors (65yrs and Over) (16.35%).

The first and second charts below shows the percentage of the population by age group and age cohort respectively. The table below also shows the number and percentages for each age group and age cohort.

You can see similar information for other states, and the United States.

Related Topics: Kentucky ACS-5Yrs Estimates, 2021 Topic List.

Data Source: US Census - ACS 5-Year Estimates.

Kentucky Percentages of Population By Age Group in 2021

55-59yrs

25-29yrs

20-24yrs

15-19yrs

10-14yrs

60-64yrs

50-54yrs

35-39yrs

45-49yrs

30-34yrs

Kentucky Percentages of Population By Age Cohort in 2021

Adults (18-64yrs)

Children (0-17yrs)

Seniors (65yrs and Over)

Kentucky Population By Age Group in 2021

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Age Group	Number of People	% of Total
55-59yrs	308608	6.87
25-29yrs	299736	6.67
20-24yrs	298606	6.64
15-19yrs	296028	6.59
10-14yrs	295536	6.58
60-64yrs	294403	6.55
50-54yrs	290682	6.47
35-39yrs	283124	6.30
45-49yrs	282354	6.28
30-34yrs	282004	6.28
5-9yrs	279548	6.22
40-44yrs	277802	6.18
Under 5yrs	270859	6.03
65-69yrs	253197	5.63
70-74yrs	197083	4.39
75-79yrs	127303	2.83
80-84yrs	82631	1.84
85yrs and Over	74637	1.66

Kentucky Population By Age Cohort in 2021

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Age Cohort	Number of People	% of Total
Adults (18-64yrs)	2737381	60.91
Children (0-17yrs)	1021909	22.74
Seniors (65yrs and Over)	734851	16.35