Mississippi 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 2.97M Mississippi population, the 10-14yrs age group constituted the highest percentage of the total population (7.17%), followed by the 15-19yrs age group (7.10%), and the 20-24yrs age group (6.72%).

In the case of age cohorts, Adults (18-64yrs) constituted the highest percentage of the total population (60.26%), followed by Children (0-17yrs) (23.80%), and Seniors (65yrs and Over) (15.94%).

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

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

Mississippi Percentages of Population By Age Group in 2021

10-14yrs

15-19yrs

20-24yrs

25-29yrs

35-39yrs

60-64yrs

55-59yrs

5-9yrs

30-34yrs

50-54yrs

Mississippi Percentages of Population By Age Cohort in 2021

Adults (18-64yrs)

Children (0-17yrs)

Seniors (65yrs and Over)

Mississippi Population By Age Group in 2021

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Age Group	Number of People	% of Total
10-14yrs	212611	7.17
15-19yrs	210730	7.10
20-24yrs	199334	6.72
25-29yrs	195971	6.61
35-39yrs	194419	6.55
60-64yrs	192016	6.47
55-59yrs	192007	6.47
5-9yrs	188097	6.34
30-34yrs	184656	6.22
50-54yrs	183860	6.20
Under 5yrs	182146	6.14
45-49yrs	180258	6.08
40-44yrs	177987	6.00
65-69yrs	159780	5.39
70-74yrs	128398	4.33
75-79yrs	84163	2.84
80-84yrs	52909	1.78
85yrs and Over	47681	1.61

Mississippi Population By Age Cohort in 2021

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Age Cohort	Number of People	% of Total
Adults (18-64yrs)	1788038	60.26
Children (0-17yrs)	706054	23.80
Seniors (65yrs and Over)	472931	15.94