Utah 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 3.23M Utah population, the 10-14yrs age group constituted the highest percentage of the total population (8.44%), followed by the 5-9yrs age group (8.25%), and the 20-24yrs age group (8.19%).

In the case of age cohorts, Adults (18-64yrs) constituted the highest percentage of the total population (59.64%), followed by Children (0-17yrs) (29.28%), and Seniors (65yrs and Over) (11.08%).

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: Utah ACS-5Yrs Estimates, 2021 Topic List.

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

Utah Percentages of Population By Age Group in 2021

10-14yrs

5-9yrs

20-24yrs

15-19yrs

25-29yrs

Under 5yrs

35-39yrs

30-34yrs

40-44yrs

45-49yrs

Utah Percentages of Population By Age Cohort in 2021

Adults (18-64yrs)

Children (0-17yrs)

Seniors (65yrs and Over)

Utah Population By Age Group in 2021

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Age Group	Number of People	% of Total
10-14yrs	272709	8.44
5-9yrs	266567	8.25
20-24yrs	264774	8.19
15-19yrs	259821	8.04
25-29yrs	246273	7.62
Under 5yrs	245639	7.60
35-39yrs	235046	7.27
30-34yrs	224216	6.94
40-44yrs	213960	6.62
45-49yrs	180540	5.59
50-54yrs	156647	4.85
55-59yrs	155436	4.81
60-64yrs	151574	4.69
65-69yrs	125144	3.87
70-74yrs	95420	2.95
75-79yrs	59852	1.85
80-84yrs	41658	1.29
85yrs and Over	36094	1.12

Utah Population By Age Cohort in 2021

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Age Cohort	Number of People	% of Total
Adults (18-64yrs)	1927139	59.64
Children (0-17yrs)	946063	29.28
Seniors (65yrs and Over)	358168	11.08