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

Updated on July 8, 2024.

Based on the US Census ACS-5Yrs estimates, in 2021, among the 3.95M Oklahoma population, the 10-14yrs age group constituted the highest percentage of the total population (7.07%), followed by the 20-24yrs age group (6.88%), and the 25-29yrs age group (6.87%).

In the case of age cohorts, Adults (18-64yrs) constituted the highest percentage of the total population (60.06%), followed by Children (0-17yrs) (24.34%), and Seniors (65yrs and Over) (15.60%).

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.

Oklahoma Percentages of Population By Age Group in 2021
10-14yrs
20-24yrs
25-29yrs
15-19yrs
5-9yrs
35-39yrs
30-34yrs
Under 5yrs
55-59yrs
60-64yrs
Oklahoma Percentages of Population By Age Cohort in 2021
Adults (18-64yrs)
Children (0-17yrs)
Seniors (65yrs and Over)
Oklahoma Population By Age Group in 2021
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Age Group Number of People % of Total
10-14yrs 279147 7.07
20-24yrs 271501 6.88
25-29yrs 271230 6.87
15-19yrs 269963 6.84
5-9yrs 266855 6.76
35-39yrs 265037 6.71
30-34yrs 264386 6.70
Under 5yrs 252929 6.41
55-59yrs 250962 6.36
60-64yrs 242256 6.14
40-44yrs 238066 6.03
45-49yrs 230993 5.85
50-54yrs 228979 5.80
65-69yrs 201967 5.12
70-74yrs 165065 4.18
75-79yrs 109442 2.77
80-84yrs 72762 1.84
85yrs and Over 66596 1.69
Oklahoma Population By Age Cohort in 2021
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Age Cohort Number of People % of Total
Adults (18-64yrs) 2371234 60.06
Children (0-17yrs) 961070 24.34
Seniors (65yrs and Over) 615832 15.60