Yellowstone County, MT population age distributions
A complete breakdown of Yellowstone County's age demographics from 0 to 85 years, distributed across 18 age groups is listed in the table below.
| Age Group | Population | % of Total Population |
|---|---|---|
| Under 5 years | 9,605 | 5.8% |
| 5 to 9 years | 11,069 | 6.69% |
| 10 to 14 years | 11,129 | 6.72% |
| 15 to 19 years | 10,222 | 6.18% |
| 20 to 24 years | 9,992 | 6.04% |
| 25 to 29 years | 11,274 | 6.81% |
| 30 to 34 years | 11,428 | 6.9% |
| 35 to 39 years | 11,050 | 6.68% |
| 40 to 44 years | 10,680 | 6.45% |
| 45 to 49 years | 9,340 | 5.64% |
| 50 to 54 years | 9,479 | 5.73% |
| 55 to 59 years | 10,200 | 6.16% |
| 60 to 64 years | 11,013 | 6.65% |
| 65 to 69 years | 9,415 | 5.69% |
| 70 to 74 years | 7,702 | 4.65% |
| 75 to 79 years | 4,918 | 2.97% |
| 80 to 84 years | 3,118 | 1.88% |
| 85 years and over | 3,890 | 2.35% |
TABLE OF CONTENTS
Yellowstone County, MT population by age group
Sources: U.S. Census Bureau, American Community Survey (ACS) 2018-2022
FIGURE 1
Yellowstone County, MT population by age group.
The largest age group is 30 to 34 years with a population of 11,428 (6.90% of the total population).
The largest age group in Yellowstone County, MT was for the group of age 30 to 34 years with a population of 11,428 (6.90%), according to the 2018-2022 American Community Survey.
At the same time, the smallest age group in Yellowstone County, MT was the 80 to 84 years with a population of 3,118 (1.88%).
Yellowstone County, MT population by age cohort
To better understand the age distribution of Yellowstone County, MT's population, we divided it into the following 3 cohorts:
- Children : Under the age of 18 years
- Adults (working population): Between the age of 18 and 64 years
- Seniors: 65 years and above
FIGURE 2
Yellowstone County, MT population by age cohort
The largest age group was 18 to 64 years with a population of 98,178 (59.31% of the total population).
Yellowstone County, MT population by age cohort
Here's the population for each of the three cohorts.
| Age Group | Population | % of Total Population |
|---|---|---|
| Under 18 years | 38,303 | 23.14% |
| 18 to 64 years | 98,178 | 59.31% |
| 65 years and over | 29,043 | 17.55% |
Key stats for each age cohort as per our analysis of U.S. Census Bureau American Community Survey:
- Yellowstone County 's population under 18 was 23.14%, compared to the 22.11% nationwide.
- Yellowstone County's working population (between 18 and 64) was 59.31%, compared to 61.36% nationwide.
- Yellowstone County's elderly or the senior population (over 65 age) was 17.55% as compared to 16.53% nationwide.
Yellowstone County, MT population pyramid
Population pyramid for Yellowstone County, MT is charted below using the estimates from U.S. Census Bureau's American Community Survey 5-Year estimates. A wide base suggests population increase, narrow base indicates declining birth rates.
Key stats from our analysis of the Yellowstone County's population pyramid:
- Youth dependency ratio, which is the number of children aged 0-14 per 100 persons aged 15-64, for Yellowstone County, MT, is 30.4.
- Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for Yellowstone County, MT, is 27.7.
- Total dependency ratio for Yellowstone County, MT is 58.1.
- Potential support ratio, which is the number of youth (working age population) per elderly, for Yellowstone County, MT is 3.6.
FIGURE 3
Yellowstone County, MT population pyramid
Yellowstone County population distrubution across age and gender. A wide base suggests population increase, narrow base indicates declining birth rates.
Yellowstone County, MT population pyramid
Here's the Yellowstone County, MT's male and female population across different age groups .
| Age Group | Population(Male) | Population(Female) | Total Population |
|---|---|---|---|
| Under 5 years | 5,014 | 4,591 | 9,605 |
| 5 to 9 years | 5,240 | 5,829 | 11,069 |
| 10 to 14 years | 6,070 | 5,059 | 11,129 |
| 15 to 19 years | 5,255 | 4,967 | 10,222 |
| 20 to 24 years | 5,013 | 4,979 | 9,992 |
| 25 to 29 years | 5,653 | 5,621 | 11,274 |
| 30 to 34 years | 5,721 | 5,707 | 11,428 |
| 35 to 39 years | 5,510 | 5,540 | 11,050 |
| 40 to 44 years | 5,505 | 5,175 | 10,680 |
| 45 to 49 years | 4,745 | 4,595 | 9,340 |
| 50 to 54 years | 4,862 | 4,617 | 9,479 |
| 55 to 59 years | 5,030 | 5,170 | 10,200 |
| 60 to 64 years | 5,370 | 5,643 | 11,013 |
| 65 to 69 years | 4,251 | 5,164 | 9,415 |
| 70 to 74 years | 3,914 | 3,788 | 7,702 |
| 75 to 79 years | 2,116 | 2,802 | 4,918 |
| 80 to 84 years | 1,408 | 1,710 | 3,118 |
| 85 years and over | 1,400 | 2,490 | 3,890 |
Things to know
What is the population of Yellowstone County, MT under 18?
Yellowstone County's population under the age of 18 is 38,303, as per the latest U.S. Census Bureau's American Community Survey estimates. This population is 23.14% of the total resident population of Yellowstone County, MT.
What is the aging population in Yellowstone County, MT?
Yellowstone County's population aged 65 years and above was 29,043. As per the U.S. Census Bureau's American Community Survey, this population is 17.55% of the entire population.
References
- U.S. Census Bureau American Community Survey (ACS) 2018-2022 5-Year Estimates