Callicoon National Bank, also known as Delaware Free Library, is a historic bank building located at Callicoon in Sullivan County, New York. It was built in 1913 and is a two-story masonry building, rectangular in plan with a flat roof. The symmetrical bluestone facade features a pedimented entrance with Ionic order columns in antis. A bank occupied the building until 1967; in 1970 it was occupied by the library. It was added to the National Register of Historic Places in 1994.