Miami city, FL 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 440.81K Miami city, FL population, the 30-34yrs age group constituted the highest percentage of the population (9.46%), followed by the 25-29yrs age group (8.28%), and the 35-39yrs age group (8.24%).

In the case of age cohorts, Adults (18-64yrs) constituted the highest percentage of the total population (66.77%), followed by Children (0-17yrs) (16.87%), and Seniors (65yrs and Over) (16.36%).

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 also see similar information for other Florida cities and places, and for Florida.

Data Source: US Census Bureau.
Miami city, FL Percentages of Population By Age Group in 2021
30-34yrs
25-29yrs
35-39yrs
45-49yrs
50-54yrs
40-44yrs
55-59yrs
60-64yrs
20-24yrs
Under 5yrs
Miami city, FL Percentages of Population By Age Cohort in 2021
Adults (18-64yrs)
Children (0-17yrs)
Seniors (65yrs and Over)
Miami city, FL Population By Age Group in 2021
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Age Group Number of People % of Total
30-34yrs 41684 9.46
25-29yrs 36499 8.28
35-39yrs 36305 8.24
45-49yrs 31326 7.11
50-54yrs 30801 6.99
40-44yrs 30099 6.83
55-59yrs 29440 6.68
60-64yrs 25946 5.89
20-24yrs 24525 5.56
Under 5yrs 24492 5.56
65-69yrs 19911 4.52
5-9yrs 19398 4.40
15-19yrs 19387 4.40
10-14yrs 18773 4.26
70-74yrs 17015 3.86
75-79yrs 13908 3.16
85yrs and Over 10852 2.46
80-84yrs 10446 2.37
Miami city, FL Population By Age Cohort in 2021
0 of 0
Age Cohort Number of People % of Total
Adults (18-64yrs) 294303 66.77
Children (0-17yrs) 74372 16.87
Seniors (65yrs and Over) 72132 16.36