Jefferson County, Idaho Age & Gender Distribution (2024)
Population distribution by age and gender for Jefferson County, Idaho
Jefferson County, Idaho Age & Gender Statistics (2024)
Total Population
33,154
Median Age
32.8
Male Median
32.6
Female Median
33.2
Jefferson County, Idaho Population Growth
Jefferson County, Idaho Demographic Trend
Since 2010, the population of has changed by +35.2%%.
+35.2%% Growth
Jefferson County, Idaho Age & Gender Pyramid
Figure 2: Population distribution by age and gender for 2024.
Jefferson County, Idaho Historical Population Data
| Year | Median Age | Population |
|---|---|---|
| 2024 | 32.8 | 33,154 |
| 2023 | 32.3 | 32,234 |
| 2022 | 31.7 | 31,383 |
| 2021 | 31.9 | 30,427 |
| 2020 | 31.9 | 29,238 |
| 2019 | 31.5 | 28,534 |
| 2018 | 31.2 | 27,969 |
| 2017 | 31.3 | 27,410 |
| 2016 | 31.4 | 27,096 |
| 2015 | 31.1 | 26,792 |
| 2014 | 30.8 | 26,620 |
| 2013 | 30.5 | 26,389 |
| 2012 | 30.2 | 25,940 |
| 2011 | 30.1 | 25,291 |
| 2010 | 30.1 | 24,523 |
Jefferson County, Idaho Age Group Breakdown (2024)
| Age Cohort | Percentage |
|---|---|
| Under 5 | 7.1% |
| 5–17 | 25.2% |
| 18–24 | 8.7% |
| 25–34 | 11.3% |
| 35–54 | 25.4% |
| 55–64 | 10.4% |
| 65+ | 11.9% |
Dependency Ratios for Jefferson County, Idaho
- Total Dependency Ratio:
- 79.4
- Youth Dependency:
- 58.0
- Old-Age Dependency:
- 21.4
The dependency ratio measures dependents (ages 0-17 and 65+) per 100 working-age individuals (ages 18-64).
Age & Gender FAQs for Jefferson County, Idaho
The median age in Jefferson County, Idaho is 32.8 years.
According to latest Census data, the total population of Jefferson County, Idaho is 33,154.
In Jefferson County, Idaho, seniors (ages 65+) make up 11.9% of the population, while children under 18 represent 25.2%.
Based on historical data since 2010, the population in Jefferson County, Idaho is aging.