Hillsdale is a town in Columbia County, New York, United States. The Hillsdale Hamlet is located on the south border of the Town of Hillsdale, at the town line with the town of Copake, and at the junction of Routes 22 and 23. The Roeliff Jansen Park, a state park run by the Town of Hillsdale, has miles of hiking and snowshoeing trails, a year-round Dog Run, many family events, and a summer program for kids. The Park is located on Route 22, about 1/2 mile south of the intersection of Routes 22 and 23. Hillsdale also has a bi-weekly Farmer's Market in the summer and fall.