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Time Zone: Sullivan County lies in the Eastern Time Zone (EST/EDT) and observes daylight saving time.

The community of Monticello is the Seat for Sullivan County.

Sullivan County was founded in 1809 and was created by taking area from UlsterCounty.

From the Census Estimates for 2009, <1> Sullivan had a population of 75,828 people. This is an increase of 2.52% since the last Census (which gave a population of 73,966 people in 2000).

At the time of the 2000 Census, Sullivan represented 0.39% of the total population of New York, making it the state's 36th most populous county (out of 62 counties).

The following table shows the recent changes in population. Other than 2000, the population counts have been estimated by the Census Bureau.

Since 2000
Year-to-Year Change
201077,547+4.84%+2.27% since 2009
200975,828+2.52%-0.19% since 2008
200875,969+2.71%-0.57% since 2007
200073,966The Last Census

More information can be found on the Sullivan County Census Page for Sullivan County.


Below are some of the communities located in Sullivan County (for more communities, please visit our Nearby Page for Sullivan County):

Community 2009
(2009vs. 2000)
Thompson   14,40914,1891.55% increase  
Fallsburg   13,40512,2349.57% increase  
Mamakating   11,31911,0022.88% increase  
Liberty   9,3739,6322.69% decrease  
Monticello   6,3306,5122.79% decrease  

Websites for Sullivan County

Official Website:   www.co.sullivan.ny.us/

If you know of a history or genealogy society whose interest includes Sullivan County, would you please send us the URL for their website? We would like to add their link to our Gazetteer. To contact us, please visit our Feedback Page.

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Footnotes ...

<1>On a yearly basis, the US Census Bureau creates an estimate of the county's population. Keep in mind that this is an estimate and not an actual count. The last physical count was the 2000 Census and the next count will be for the 2010 Census.

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<2>All Quarter-dollar coin images from the United States Mint.

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