Riley County, Kansas Age & Gender Statistics (2024)

Total Population

71,946

Median Age

25.5

Male Median

25.1

Female Median

26.4

Riley County, Kansas Population Growth

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

Riley County, Kansas Demographic Trend

Since 2010, the population of has changed by +4.2%%.

+4.2%% Growth

Riley County, Kansas Age & Gender Pyramid

Population pyramid for

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


Riley County, Kansas Historical Population Data

YearMedian AgePopulation
202425.571,946
202325.271,710
202224.972,105
202125.572,602
202025.474,059
201925.175,056
201825.175,296
201724.975,696
201624.975,026
201524.775,022
201424.674,478
201324.573,243
201224.371,927
201124.370,249
201024.169,035

Riley County, Kansas Age Group Breakdown (2024)

Age CohortPercentage
Under 54.8%
5–1711.3%
18–2432.6%
25–3416.3%
35–5417.7%
55–647.3%
65+10.0%

Dependency Ratios for Riley County, Kansas

Total Dependency Ratio:
35.4
Youth Dependency:
21.8
Old-Age Dependency:
13.6

The dependency ratio measures dependents (ages 0-17 and 65+) per 100 working-age individuals (ages 18-64).



Age & Gender FAQs for Riley County, Kansas

The median age in Riley County, Kansas is 25.5 years.

According to latest Census data, the total population of Riley County, Kansas is 71,946.

In Riley County, Kansas, seniors (ages 65+) make up 10.0% of the population, while children under 18 represent 11.3%.

Based on historical data since 2010, the population in Riley County, Kansas has remained stable.
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