Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Natural Bridge is a hamlet (and census-designated place) in Jefferson County, New York, United States. The population was 392 at the 2000 census. The name is derived from a natural rock formation over a river. Natural Bridge is in the northeast corner of the Town of Wilna and is east of Watertown. Natural Bridge Station is a location southeast of the community. According to the United States Census Bureau, the community has a total area of 1.4 square miles (3.6 km²), all land.