Tennessee 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 6.86M Tennessee population, the 25-29yrs age group constituted the highest percentage of the total population (7.03%), followed by the 55-59yrs age group (6.68%), and the 30-34yrs age group (6.63%).

In the case of age cohorts, Adults (18-64yrs) constituted the highest percentage of the total population (61.33%), followed by Children (0-17yrs) (22.37%), and Seniors (65yrs and Over) (16.30%).

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: Tennessee ACS-5Yrs Estimates, 2021 Topic List.

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

Tennessee Percentages of Population By Age Group in 2021

25-29yrs

55-59yrs

30-34yrs

10-14yrs

50-54yrs

60-64yrs

35-39yrs

20-24yrs

45-49yrs

15-19yrs

Tennessee Percentages of Population By Age Cohort in 2021

Adults (18-64yrs)

Children (0-17yrs)

Seniors (65yrs and Over)

Tennessee Population By Age Group in 2021

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Age Group	Number of People	% of Total
25-29yrs	482422	7.03
55-59yrs	458189	6.68
30-34yrs	454732	6.63
10-14yrs	447531	6.52
50-54yrs	446394	6.51
60-64yrs	446339	6.51
35-39yrs	444180	6.48
20-24yrs	443703	6.47
45-49yrs	439227	6.40
15-19yrs	438290	6.39
40-44yrs	418807	6.11
5-9yrs	415626	6.06
Under 5yrs	405867	5.92
65-69yrs	378049	5.51
70-74yrs	305157	4.45
75-79yrs	198315	2.89
80-84yrs	126011	1.84
85yrs and Over	110658	1.61

Tennessee Population By Age Cohort in 2021

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Age Cohort	Number of People	% of Total
Adults (18-64yrs)	4207064	61.33
Children (0-17yrs)	1534243	22.37
Seniors (65yrs and Over)	1118190	16.30