US ZIP Code 53121 Age & Gender Statistics (2024)

Total Population

18,551

Median Age

43.2

Male Median

42.5

Female Median

44.3

US ZIP Code 53121 Population Growth

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

US ZIP Code 53121 Demographic Trend

Since 2021, the population of has changed by -1.4%%.

-1.4%% Growth

US ZIP Code 53121 Age & Gender Pyramid

Population pyramid for

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


US ZIP Code 53121 Historical Population Data

YearMedian AgePopulation
202443.218,551
202343.118,640
202244.118,868
202142.718,813

US ZIP Code 53121 Age Group Breakdown (2024)

Age CohortPercentage
Under 54.4%
5–1716.2%
18–248.4%
25–3411.2%
35–5424.1%
55–6415.9%
65+19.7%

Dependency Ratios for US ZIP Code 53121

Total Dependency Ratio:
67.7
Youth Dependency:
34.6
Old-Age Dependency:
33.1

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 53121

The median age in US ZIP Code 53121 is 43.2 years.

According to latest Census data, the total population of US ZIP Code 53121 is 18,551.

In US ZIP Code 53121, seniors (ages 65+) make up 19.7% of the population, while children under 18 represent 16.2%.

Based on historical data since 2021, the population in US ZIP Code 53121 has remained stable.
Back to Overview