Howard County, MD 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 329.25K Howard County, MD population, the 10-14yrs age group constituted the highest percentage of the total population (7.48%), followed by the 35-39yrs age group (7.27%), and the 50-54yrs age group (7.21%).

In the case of age cohorts, Adults (18-64yrs) constituted the highest percentage of the total population (61.63%), followed by Children (0-17yrs) (24.44%), and Seniors (65yrs and Over) (13.93%).

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 Maryland counties, and for Maryland.

Howard County, MD Percentages of Population By Age Group in 2021
10-14yrs
35-39yrs
50-54yrs
55-59yrs
45-49yrs
40-44yrs
15-19yrs
5-9yrs
30-34yrs
60-64yrs
Howard County, MD Percentages of Population By Age Cohort in 2021
Adults (18-64yrs)
Children (0-17yrs)
Seniors (65yrs and Over)
Howard County, MD Population By Age Group in 2021
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Age Group Number of People % of Total
10-14yrs 24618 7.48
35-39yrs 23940 7.27
50-54yrs 23732 7.21
55-59yrs 23564 7.16
45-49yrs 23407 7.11
40-44yrs 23352 7.09
15-19yrs 22558 6.85
5-9yrs 21919 6.66
30-34yrs 20476 6.22
60-64yrs 19738 6.00
Under 5yrs 18987 5.77
25-29yrs 18781 5.70
20-24yrs 18320 5.56
65-69yrs 15826 4.81
70-74yrs 12306 3.74
75-79yrs 8038 2.44
85yrs and Over 5108 1.55
80-84yrs 4578 1.39
Howard County, MD Population By Age Cohort in 2021
0 of 0
Age Cohort Number of People % of Total
Adults (18-64yrs) 202920 61.63
Children (0-17yrs) 80472 24.44
Seniors (65yrs and Over) 45856 13.93