San Joaquin County, California Age & Gender Statistics (2024)

Total Population

797,334

Median Age

35.4

Male Median

34.6

Female Median

36.2

San Joaquin County, California Population Growth

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

San Joaquin County, California Demographic Trend

Since 2010, the population of has changed by +18.4%%.

+18.4%% Growth

San Joaquin County, California Age & Gender Pyramid

Population pyramid for

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


San Joaquin County, California Historical Population Data

YearMedian AgePopulation
202435.4797,334
202335.2787,416
202234.8779,445
202134.6771,406
202034.4751,615
201934.3742,603
201834.1732,212
201733.9724,153
201633.7714,860
201533.5708,554
201433.2701,050
201332.9693,177
201232.6687,036
201132.5680,277
201032.3673,613

San Joaquin County, California Age Group Breakdown (2024)

Age CohortPercentage
Under 56.5%
5–1719.7%
18–249.4%
25–3413.8%
35–5426.0%
55–6411.1%
65+13.5%

Dependency Ratios for San Joaquin County, California

Total Dependency Ratio:
65.8
Youth Dependency:
43.4
Old-Age Dependency:
22.4

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



Age & Gender FAQs for San Joaquin County, California

The median age in San Joaquin County, California is 35.4 years.

According to latest Census data, the total population of San Joaquin County, California is 797,334.

In San Joaquin County, California, seniors (ages 65+) make up 13.5% of the population, while children under 18 represent 19.7%.

Based on historical data since 2010, the population in San Joaquin County, California is aging.
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