Gallatin County, MT population age distributions
A complete breakdown of Gallatin 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 | 5,894 | 4.92% |
| 5 to 9 years | 6,437 | 5.38% |
| 10 to 14 years | 6,825 | 5.7% |
| 15 to 19 years | 8,723 | 7.29% |
| 20 to 24 years | 14,730 | 12.31% |
| 25 to 29 years | 10,679 | 8.92% |
| 30 to 34 years | 9,015 | 7.53% |
| 35 to 39 years | 8,663 | 7.24% |
| 40 to 44 years | 7,954 | 6.65% |
| 45 to 49 years | 6,746 | 5.64% |
| 50 to 54 years | 5,873 | 4.91% |
| 55 to 59 years | 5,980 | 5% |
| 60 to 64 years | 6,584 | 5.5% |
| 65 to 69 years | 5,200 | 4.34% |
| 70 to 74 years | 4,885 | 4.08% |
| 75 to 79 years | 2,654 | 2.22% |
| 80 to 84 years | 1,382 | 1.15% |
| 85 years and over | 1,461 | 1.22% |
TABLE OF CONTENTS
Gallatin County, MT population by age group
Sources: U.S. Census Bureau, American Community Survey (ACS) 2018-2022
FIGURE 1
Gallatin County, MT population by age group.
The largest age group is 20 to 24 years with a population of 14,730 (12.31% of the total population).
The largest age group in Gallatin County, MT was for the group of age 20 to 24 years with a population of 14,730 (12.31%), according to the 2018-2022 American Community Survey.
At the same time, the smallest age group in Gallatin County, MT was the 80 to 84 years with a population of 1,382 (1.15%).
Gallatin County, MT population by age cohort
To better understand the age distribution of Gallatin 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
Gallatin County, MT population by age cohort
The largest age group was 18 to 64 years with a population of 81,128 (67.78% of the total population).
Key stats for each age cohort as per our analysis of U.S. Census Bureau American Community Survey:
- Gallatin County 's population under 18 was 19.20%, compared to the 22.11% nationwide.
- Gallatin County's working population (between 18 and 64) was 67.78%, compared to 61.36% nationwide.
- Gallatin County's elderly or the senior population (over 65 age) was 13.02% as compared to 16.53% nationwide.
Gallatin County, MT population pyramid
Population pyramid for Gallatin 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 Gallatin County's population pyramid:
- Youth dependency ratio, which is the number of children aged 0-14 per 100 persons aged 15-64, for Gallatin County, MT, is 22.6.
- Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for Gallatin County, MT, is 18.3.
- Total dependency ratio for Gallatin County, MT is 40.9.
- Potential support ratio, which is the number of youth (working age population) per elderly, for Gallatin County, MT is 5.5.
FIGURE 3
Gallatin County, MT population pyramid
Gallatin County population distrubution across age and gender. A wide base suggests population increase, narrow base indicates declining birth rates.
Gallatin County, MT population pyramid
Here's the Gallatin County, MT's male and female population across different age groups .
| Age Group | Population(Male) | Population(Female) | Total Population |
|---|---|---|---|
| Under 5 years | 2,760 | 3,134 | 5,894 |
| 5 to 9 years | 3,329 | 3,108 | 6,437 |
| 10 to 14 years | 3,478 | 3,347 | 6,825 |
| 15 to 19 years | 4,522 | 4,201 | 8,723 |
| 20 to 24 years | 8,271 | 6,459 | 14,730 |
| 25 to 29 years | 5,945 | 4,734 | 10,679 |
| 30 to 34 years | 4,882 | 4,133 | 9,015 |
| 35 to 39 years | 4,326 | 4,337 | 8,663 |
| 40 to 44 years | 4,397 | 3,557 | 7,954 |
| 45 to 49 years | 3,654 | 3,092 | 6,746 |
| 50 to 54 years | 3,070 | 2,803 | 5,873 |
| 55 to 59 years | 2,945 | 3,035 | 5,980 |
| 60 to 64 years | 3,406 | 3,178 | 6,584 |
| 65 to 69 years | 2,652 | 2,548 | 5,200 |
| 70 to 74 years | 2,363 | 2,522 | 4,885 |
| 75 to 79 years | 1,304 | 1,350 | 2,654 |
| 80 to 84 years | 629 | 753 | 1,382 |
| 85 years and over | 601 | 860 | 1,461 |
Things to know
What is the population of Gallatin County, MT under 18?
Gallatin County's population under the age of 18 is 22,975, as per the latest U.S. Census Bureau's American Community Survey estimates. This population is 19.20% of the total resident population of Gallatin County, MT.
What is the aging population in Gallatin County, MT?
Gallatin County's population aged 65 years and above was 15,582. As per the U.S. Census Bureau's American Community Survey, this population is 13.02% of the entire population.
References
- U.S. Census Bureau American Community Survey (ACS) 2018-2022 5-Year Estimates