Cecil 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 103.37K Cecil County, MD population, the 60-64yrs age group constituted the highest percentage of the total population (7.90%), followed by the 50-54yrs age group (7.66%), and the 55-59yrs age group (7.18%).

In the case of age cohorts, Adults (18-64yrs) constituted the highest percentage of the total population (61.52%), followed by Children (0-17yrs) (22.68%), and Seniors (65yrs and Over) (15.80%).

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.

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

Cecil County, MD Percentages of Population By Age Group in 2021

60-64yrs

50-54yrs

55-59yrs

10-14yrs

45-49yrs

15-19yrs

25-29yrs

40-44yrs

30-34yrs

5-9yrs

Cecil County, MD Percentages of Population By Age Cohort in 2021

Adults (18-64yrs)

Children (0-17yrs)

Seniors (65yrs and Over)

Cecil County, MD Population By Age Group in 2021

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Age Group	Number of People	% of Total
60-64yrs	8170	7.90
50-54yrs	7913	7.66
55-59yrs	7418	7.18
10-14yrs	7094	6.86
45-49yrs	6709	6.49
15-19yrs	6574	6.36
25-29yrs	6489	6.28
40-44yrs	6478	6.27
30-34yrs	6372	6.16
5-9yrs	6301	6.10
35-39yrs	5954	5.76
20-24yrs	5801	5.61
65-69yrs	5774	5.59
Under 5yrs	5760	5.57
70-74yrs	4580	4.43
75-79yrs	2915	2.82
85yrs and Over	1559	1.51
80-84yrs	1509	1.46

Cecil County, MD Population By Age Cohort in 2021

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Age Cohort	Number of People	% of Total
Adults (18-64yrs)	63591	61.52
Children (0-17yrs)	23442	22.68
Seniors (65yrs and Over)	16337	15.80