Twin Falls County, Idaho Age & Gender Distribution (2024)
Population distribution by age and gender for Twin Falls County, Idaho
Twin Falls County, Idaho Age & Gender Statistics (2024)
Total Population
93,734
Median Age
36.1
Male Median
35.6
Female Median
36.6
Twin Falls County, Idaho Population Growth

Twin Falls County, Idaho Demographic Trend
Since 2010, the population of has changed by +25.1%%.
+25.1%% Growth
Twin Falls County, Idaho Age & Gender Pyramid

Figure 2: Population distribution by age and gender for 2024.
Twin Falls County, Idaho Historical Population Data
| Year | Median Age | Population |
|---|---|---|
| 2024 | 36.1 | 93,734 |
| 2023 | 35.8 | 92,121 |
| 2022 | 35.5 | 90,592 |
| 2021 | 35.3 | 89,128 |
| 2020 | 35.0 | 86,198 |
| 2019 | 34.7 | 84,869 |
| 2018 | 34.7 | 83,666 |
| 2017 | 34.6 | 82,248 |
| 2016 | 34.6 | 80,955 |
| 2015 | 34.5 | 80,004 |
| 2014 | 34.6 | 78,933 |
| 2013 | 34.6 | 78,067 |
| 2012 | 34.6 | 77,122 |
| 2011 | 34.5 | 76,129 |
| 2010 | 34.5 | 74,929 |
Twin Falls County, Idaho Age Group Breakdown (2024)
| Age Cohort | Percentage |
|---|---|
| Under 5 | 6.3% |
| 5–17 | 20.0% |
| 18–24 | 8.7% |
| 25–34 | 13.2% |
| 35–54 | 24.1% |
| 55–64 | 11.1% |
| 65+ | 16.6% |
Dependency Ratios for Twin Falls County, Idaho
- Total Dependency Ratio:
- 75.2
- Youth Dependency:
- 46.1
- Old-Age Dependency:
- 29.1
The dependency ratio measures dependents (ages 0-17 and 65+) per 100 working-age individuals (ages 18-64).
Age & Gender FAQs for Twin Falls County, Idaho
The median age in Twin Falls County, Idaho is 36.1 years.
According to latest Census data, the total population of Twin Falls County, Idaho is 93,734.
In Twin Falls County, Idaho, seniors (ages 65+) make up 16.6% of the population, while children under 18 represent 20.0%.
Based on historical data since 2010, the population in Twin Falls County, Idaho is aging.