How many people live in Sussex County, NJ?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 147,400 people living in Sussex County, NJ. That makes Sussex County the 17th-most populous county in New Jersey. It is home to 1.5% of people living in the state.
147K
population of Sussex County, NJ (2024)
1.5%
County share of the New Jersey population (2024)
About 147,400 people lived in Sussex County, NJ in 2024.
Population estimates, 2000–2024
What are Sussex County, NJ’s age demographics?
About 29,400 Sussex County, NJ residents are aged 65 and older in 2024. That represents 19.9% of its population. For comparison, the age group represents 18% of New Jersey’s population and 18% in the US overall.
Another 28,600 Sussex County residents, or 19.4% of the population, were children under 18. For comparison, the age group represents 21.5% of New Jersey’s population and 21.6% in the US overall.
A higher share of Sussex County, NJ's population is aged 45–64 than the US as a whole.
Population estimates by age group, (2024)
What are Sussex County, NJ’s racial and ethnic demographics?
Non-Hispanic white residents make up 79.4% of the Sussex County, NJ population, higher than the national share of 57.5%.
In contrast, Sussex County’s non-Hispanic Black or African American population accounts for 2.9%, below the 12.6% nationwide, and the Hispanic population makes up 13.6% of the county, compared with 20% 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, NJ has a higher share of a non-Hispanic white population than New Jersey as a whole.
Population estimates by race and ethnicity, (2024)
The largest city or town in Sussex County, NJ is Vernon with about 22,900 residents in 2024.
Cities and towns in Sussex County, NJ ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Vernon | 22,879 |
| 2. | Sparta | 20,362 |
| 3. | Hopatcong borough | 14,750 |
| 4. | Wantage | 11,087 |
| 5. | Hardyston | 8,472 |
| 6. | Newton | 8,435 |
| 7. | Byram | 8,217 |
| 8. | Andover | 5,685 |
| 9. | Frankford | 5,349 |
| 10. | Franklin borough | 5,059 |
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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.
