US ZIP Code 94121 Age & Gender Statistics (2024)

Total Population

41,995

Median Age

44.5

Male Median

44.2

Female Median

44.7

US ZIP Code 94121 Population Growth

Population trends in
Figure 1: Annual population growth trend for (2021–2024).

US ZIP Code 94121 Demographic Trend

Since 2021, the population of has changed by -4.5%%.

-4.5%% Growth

US ZIP Code 94121 Age & Gender Pyramid

Population pyramid for

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


US ZIP Code 94121 Historical Population Data

YearMedian AgePopulation
202444.541,995
202343.742,987
202242.643,304
202141.643,964

US ZIP Code 94121 Age Group Breakdown (2024)

Age CohortPercentage
Under 54.1%
5–1711.2%
18–245.2%
25–3415.4%
35–5428.7%
55–6413.4%
65+22.1%

Dependency Ratios for US ZIP Code 94121

Total Dependency Ratio:
59.6
Youth Dependency:
24.3
Old-Age Dependency:
35.2

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



Age & Gender FAQs for US ZIP Code 94121

The median age in US ZIP Code 94121 is 44.5 years.

According to latest Census data, the total population of US ZIP Code 94121 is 41,995.

In US ZIP Code 94121, seniors (ages 65+) make up 22.1% of the population, while children under 18 represent 11.2%.

Based on historical data since 2021, the population in US ZIP Code 94121 is aging.
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