Keene Valley Library is a historic library building located at Keene Valley in Essex County, New York. The original building was built in 1896, with additions completed in 1923, 1931, 1962, and 1985. The original main block is a one story timber frame structure on a random ashlar foundation. The building exhibits features of the Shingle Style and Adirondack Architecture.It was listed on the National Register of Historic Places in 2000.