Maine 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 1.36M Maine population, the 60-64yrs age group constituted the highest percentage of the total population (7.93%), followed by the 55-59yrs age group (7.87%), and the 65-69yrs age group (7.02%).

In the case of age cohorts, Adults (18-64yrs) constituted the highest percentage of the total population (60.55%), followed by Seniors (65yrs and Over) (20.69%), and Children (0-17yrs) (18.76%).

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.

Related Topics: Maine ACS-5Yrs Estimates, 2021 Topic List.

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

Maine Percentages of Population By Age Group in 2021

60-64yrs

55-59yrs

65-69yrs

50-54yrs

45-49yrs

30-34yrs

35-39yrs

15-19yrs

25-29yrs

40-44yrs

Maine Percentages of Population By Age Cohort in 2021

Adults (18-64yrs)

Seniors (65yrs and Over)

Children (0-17yrs)

Maine Population By Age Group in 2021

Items per page:

0 of 0

Age Group	Number of People	% of Total
60-64yrs	107649	7.93
55-59yrs	106765	7.87
65-69yrs	95190	7.02
50-54yrs	94598	6.97
45-49yrs	84509	6.23
30-34yrs	82588	6.09
35-39yrs	81908	6.04
15-19yrs	79853	5.88
25-29yrs	79663	5.87
40-44yrs	76399	5.63
70-74yrs	76069	5.61
20-24yrs	74775	5.51
10-14yrs	74056	5.46
5-9yrs	69530	5.12
Under 5yrs	63932	4.71
75-79yrs	46773	3.45
85yrs and Over	31927	2.35
80-84yrs	30862	2.27

Maine Population By Age Cohort in 2021

Items per page:

0 of 0

Age Cohort	Number of People	% of Total
Adults (18-64yrs)	821640	60.55
Seniors (65yrs and Over)	280821	20.69
Children (0-17yrs)	254585	18.76