Madison County, Idaho Age & Gender Distribution (2024)
Population distribution by age and gender for Madison County, Idaho
Madison County, Idaho Age & Gender Statistics (2024)
Total Population
54,618
Median Age
21.4
Male Median
22.5
Female Median
20.4
Madison County, Idaho Population Growth

Madison County, Idaho Demographic Trend
Since 2010, the population of has changed by +50.0%%.
+50.0%% Growth
Madison County, Idaho Age & Gender Pyramid

Figure 2: Population distribution by age and gender for 2024.
Madison County, Idaho Historical Population Data
| Year | Median Age | Population |
|---|---|---|
| 2024 | 21.4 | 54,618 |
| 2023 | 21.4 | 53,578 |
| 2022 | 21.6 | 52,487 |
| 2021 | 23.3 | 50,979 |
| 2020 | 23.5 | 39,725 |
| 2019 | 23.5 | 39,100 |
| 2018 | 23.4 | 38,705 |
| 2017 | 23.5 | 38,241 |
| 2016 | 23.3 | 38,114 |
| 2015 | 23.2 | 37,916 |
| 2014 | 23.0 | 37,754 |
| 2013 | 22.9 | 37,542 |
| 2012 | 22.7 | 37,311 |
| 2011 | 22.5 | 36,984 |
| 2010 | 22.5 | 36,413 |
Madison County, Idaho Age Group Breakdown (2024)
| Age Cohort | Percentage |
|---|---|
| Under 5 | 6.8% |
| 5–17 | 13.4% |
| 18–24 | 46.0% |
| 25–34 | 13.7% |
| 35–54 | 10.6% |
| 55–64 | 4.0% |
| 65+ | 5.4% |
Dependency Ratios for Madison County, Idaho
- Total Dependency Ratio:
- 34.5
- Youth Dependency:
- 27.2
- Old-Age Dependency:
- 7.3
The dependency ratio measures dependents (ages 0-17 and 65+) per 100 working-age individuals (ages 18-64).
Age & Gender FAQs for Madison County, Idaho
The median age in Madison County, Idaho is 21.4 years.
According to latest Census data, the total population of Madison County, Idaho is 54,618.
In Madison County, Idaho, seniors (ages 65+) make up 5.4% of the population, while children under 18 represent 13.4%.
Based on historical data since 2010, the population in Madison County, Idaho has remained stable.