Sussex County, Delaware Age & Gender Statistics (2024)

Total Population

255,626

Median Age

51.9

Male Median

50.1

Female Median

53.6

Sussex County, Delaware Population Growth

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

Sussex County, Delaware Demographic Trend

Since 2010, the population of has changed by +33.9%%.

+33.9%% Growth

Sussex County, Delaware Age & Gender Pyramid

Population pyramid for

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


Sussex County, Delaware Historical Population Data

YearMedian AgePopulation
202451.9255,626
202351.4247,799
202251.3240,668
202150.7234,045
202050.3230,249
201949.6224,384
201849.0219,540
201748.3215,551
201647.6211,224
201547.0207,302
201446.5203,737
201345.9200,632
201245.4197,681
201145.1194,442
201044.6190,846

Sussex County, Delaware Age Group Breakdown (2024)

Age CohortPercentage
Under 54.7%
5–1713.3%
18–246.1%
25–349.5%
35–5419.7%
55–6416.3%
65+30.2%

Dependency Ratios for Sussex County, Delaware

Total Dependency Ratio:
93.5
Youth Dependency:
35.0
Old-Age Dependency:
58.5

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



Age & Gender FAQs for Sussex County, Delaware

The median age in Sussex County, Delaware is 51.9 years.

According to latest Census data, the total population of Sussex County, Delaware is 255,626.

In Sussex County, Delaware, seniors (ages 65+) make up 30.2% of the population, while children under 18 represent 13.3%.

Based on historical data since 2010, the population in Sussex County, Delaware is aging.
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