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

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

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

Population pyramid for

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


Twin Falls County, Idaho Historical Population Data

YearMedian AgePopulation
202436.193,734
202335.892,121
202235.590,592
202135.389,128
202035.086,198
201934.784,869
201834.783,666
201734.682,248
201634.680,955
201534.580,004
201434.678,933
201334.678,067
201234.677,122
201134.576,129
201034.574,929

Twin Falls County, Idaho Age Group Breakdown (2024)

Age CohortPercentage
Under 56.3%
5–1720.0%
18–248.7%
25–3413.2%
35–5424.1%
55–6411.1%
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.
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