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

Population trends in
Figure 1: Annual population growth trend for (2010–2024).

Madison County, Idaho Demographic Trend

Since 2010, the population of has changed by +50.0%%.

+50.0%% Growth

Madison County, Idaho Age & Gender Pyramid

Population pyramid for

Figure 2: Population distribution by age and gender for 2024.


Madison County, Idaho Historical Population Data

YearMedian AgePopulation
202421.454,618
202321.453,578
202221.652,487
202123.350,979
202023.539,725
201923.539,100
201823.438,705
201723.538,241
201623.338,114
201523.237,916
201423.037,754
201322.937,542
201222.737,311
201122.536,984
201022.536,413

Madison County, Idaho Age Group Breakdown (2024)

Age CohortPercentage
Under 56.8%
5–1713.4%
18–2446.0%
25–3413.7%
35–5410.6%
55–644.0%
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.
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