Thousand Island Park, also known as TI Park, is a hamlet and census-designated place in the town of Orleans, Jefferson County, New York, United States, in the Thousand Islands region on the St. Lawrence River. Founded in 1875 as a holiday camp, the incorporated community remains a seasonal summer community; despite 323 housing units, there wa…Thousand Island Park, also known as TI Park, is a hamlet and census-designated place in the town of Orleans, Jefferson County, New York, United States, in the Thousand Islands region on the St. Lawrence River. Founded in 1875 as a holiday camp, the incorporated community remains a seasonal summer community; despite 323 housing units, there was only a population of 31 permanent residents as of the 2010 census.