How many people live in Sullivan County, NY?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 80,500 people living in Sullivan County, NY. That makes Sullivan County the 33rd-most populous county in New York. It is home to 0.4% of people living in the state.
80.5K
population of Sullivan County, NY (2024)
0.4%
County share of the New York population (2024)
About 80,500 people lived in Sullivan County, NY in 2024.
Population estimates, 2000–2024
What are Sullivan County, NY’s age demographics?
About 16,100 Sullivan County residents are aged 65 and older in 2024. That represents 20% of its population. For comparison, the age group represents 18.9% of New York’s population and 18% in the US overall.
Another 17,200 Sullivan County residents, or 21.4% of the population, were children under 18. For comparison, the age group represents 20.1% of New York’s population and 21.6% in the US overall.
A lower share of Sullivan County, NY's population is aged 25–44 than the US as a whole.
Population estimates by age group, (2024)
What are Sullivan County, NY’s racial and ethnic demographics?
Non-Hispanic white residents make up 66% of the Sullivan County, NY population, higher than the national share of 57.5%. Sullivan County, NY also has a larger share of people identifying as Hispanic (20.3%) than the US overall (20%).
In contrast, Sullivan County’s non-Hispanic Asian population accounts for 2.1%, below the 6.5% nationwide, and the non-Hispanic Black or African American population makes up 8.9% of the county, compared with 12.6% 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.
Sullivan County, NY has a higher share of a non-Hispanic white population than New York as a whole.
Population estimates by race and ethnicity, (2024)
The largest city or town in Sullivan County, NY is Monticello with about 7,200 residents in 2024.
Cities and towns in Sullivan County, NY ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Monticello | 7,228 |
| 2. | Liberty | 5,136 |
| 3. | Bethel | 4,210 |
| 4. | Neversink | 3,382 |
| 5. | Rockland | 3,346 |
| 6. | Lumberland | 2,305 |
| 7. | Highland | 2,226 |
| 8. | Delaware | 2,209 |
| 9. | Tusten | 1,446 |
| 10. | Cochecton | 1,442 |
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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.
