Sullivan County Flag

Sullivan County

State:
New York
County Seat:
Monticello

Sullivan County's estimated 2026 population is 80,271 with a growth rate of -0.39% in the past year according to the most recent United States census data. Sullivan County is the 32nd largest county in New York. The 2010 population was 77,480 and has seen a growth of 3.6% since that time.

80,271
Total Population
83
Population Density (mi²)
32
Population Rank (State)
-315 -0.39%
Annual Population Growth

Sullivan County Population

Demographics

Economics and Income Statistics