Gem County, Idaho Age & Gender Distribution (2024)
Population distribution by age and gender for Gem County, Idaho
Gem County, Idaho Age & Gender Statistics (2024)
Total Population
20,614
Median Age
44.2
Male Median
42.9
Female Median
45.0
Gem County, Idaho Population Growth

Gem County, Idaho Demographic Trend
Since 2010, the population of has changed by +22.9%%.
+22.9%% Growth
Gem County, Idaho Age & Gender Pyramid

Figure 2: Population distribution by age and gender for 2024.
Gem County, Idaho Historical Population Data
| Year | Median Age | Population |
|---|---|---|
| 2024 | 44.2 | 20,614 |
| 2023 | 42.8 | 19,854 |
| 2022 | 44.0 | 19,250 |
| 2021 | 44.7 | 18,692 |
| 2020 | 45.0 | 17,771 |
| 2019 | 44.6 | 17,331 |
| 2018 | 45.1 | 17,052 |
| 2017 | 45.2 | 16,850 |
| 2016 | 45.4 | 16,853 |
| 2015 | 44.7 | 16,731 |
| 2014 | 43.8 | 16,732 |
| 2013 | 42.7 | 16,722 |
| 2012 | 42.2 | 16,768 |
| 2011 | 41.8 | 16,783 |
| 2010 | 41.7 | 16,778 |
Gem County, Idaho Age Group Breakdown (2024)
| Age Cohort | Percentage |
|---|---|
| Under 5 | 4.9% |
| 5–17 | 17.0% |
| 18–24 | 6.9% |
| 25–34 | 10.8% |
| 35–54 | 22.7% |
| 55–64 | 14.5% |
| 65+ | 23.1% |
Dependency Ratios for Gem County, Idaho
- Total Dependency Ratio:
- 81.8
- Youth Dependency:
- 39.9
- Old-Age Dependency:
- 41.9
The dependency ratio measures dependents (ages 0-17 and 65+) per 100 working-age individuals (ages 18-64).
Age & Gender FAQs for Gem County, Idaho
The median age in Gem County, Idaho is 44.2 years.
According to latest Census data, the total population of Gem County, Idaho is 20,614.
In Gem County, Idaho, seniors (ages 65+) make up 23.1% of the population, while children under 18 represent 17.0%.
Based on historical data since 2010, the population in Gem County, Idaho is aging.