Key West 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 26.78K Key West city, FL population, the 55-59yrs age group constituted the highest percentage of the population (9.41%), followed by the 35-39yrs age group (8.07%), and the 25-29yrs age group (7.96%).

In the case of age cohorts, Adults (18-64yrs) constituted the highest percentage of the total population (66.87%), followed by Seniors (65yrs and Over) (18.74%), and Children (0-17yrs) (14.39%).

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.
Key West city, FL Percentages of Population By Age Group in 2021
55-59yrs
35-39yrs
25-29yrs
30-34yrs
60-64yrs
40-44yrs
50-54yrs
70-74yrs
45-49yrs
65-69yrs
Key West city, FL Percentages of Population By Age Cohort in 2021
Adults (18-64yrs)
Seniors (65yrs and Over)
Children (0-17yrs)
Key West city, FL Population By Age Group in 2021
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Age Group Number of People % of Total
55-59yrs 2521 9.41
35-39yrs 2161 8.07
25-29yrs 2130 7.96
30-34yrs 2025 7.56
60-64yrs 1963 7.33
40-44yrs 1949 7.28
50-54yrs 1923 7.18
70-74yrs 1747 6.52
45-49yrs 1638 6.12
65-69yrs 1454 5.43
10-14yrs 1224 4.57
20-24yrs 1181 4.41
Under 5yrs 1067 3.99
15-19yrs 1027 3.84
5-9yrs 950 3.55
75-79yrs 697 2.60
80-84yrs 595 2.22
85yrs and Over 524 1.96
Key West city, FL Population By Age Cohort in 2021
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Age Cohort Number of People % of Total
Adults (18-64yrs) 17906 66.87
Seniors (65yrs and Over) 5017 18.74
Children (0-17yrs) 3853 14.39