How many people live in Sussex County, DE?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 271,100 people living in Sussex County, DE. That makes Sussex County the second-most populous county in Delaware. It is home to 25.6% of people living in the state.
271K
population of Sussex County, DE (2024)
25.6%
County share of the Delaware population (2024)
About 271,100 people lived in Sussex County, DE in 2024.
Population estimates, 2000–2024
What are Sussex County, DE’s age demographics?
About 86,300 Sussex County residents are aged 65 and older in 2024. That represents 31.8% of its population. For comparison, the age group represents 21.8% of Delaware’s population and 18% in the US overall.
Another 47,800 Sussex County residents, or 17.6% of the population, were children under 18. For comparison, the age group represents 20.4% of Delaware’s population and 21.6% in the US overall.
A higher share of Sussex County, DE's population is aged 65 or older than the US as a whole.
Population estimates by age group, (2024)
What are Sussex County, DE’s racial and ethnic demographics?
Non-Hispanic white residents make up 73.2% of the Sussex County, DE population, higher than the national share of 57.5%.
In contrast, Sussex County’s Hispanic population accounts for 12.1%, below the 20% nationwide, and the non-Hispanic Asian population makes up 1.5% of the county, compared with 6.5% nationally.
Racial and ethnic make up differ based on location. These figures reflect how people identified their race alone (not in combination with other races), and separate out Hispanic or Latino ethnicity, following Census reporting standards.
Sussex County, DE has a higher share of a non-Hispanic white population than Delaware as a whole.
Population estimates by race and ethnicity, (2024)
The largest city or town in Sussex County, DE is Seaford with about 9,000 residents in 2024.
Cities and towns in Sussex County, DE ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Seaford | 8,952 |
| 2. | Georgetown | 8,098 |
| 3. | Milford (pt.) | 8,045 |
| 4. | Millsboro | 7,864 |
| 5. | Laurel | 4,395 |
| 6. | Milton | 3,773 |
| 7. | Lewes | 3,702 |
| 8. | Selbyville | 3,285 |
| 9. | Ocean View | 3,023 |
| 10. | Bridgeville | 2,909 |
Keep exploring
Methodology
USAFacts standardizes data, in areas such as time and demographics, to make it easier to understand and compare.
The analysis was generated with the help of AI and reviewed by USAFacts for accuracy.
Page sources
USAFacts endeavors to share the most up-to-date information available. We sourced the data on this page directly from government agencies; however, the intervals at which agencies publish updated data vary.
