The Ernest N. Warren Supreme Court Library in Tompkins County was created by statute in July 1988 (L.1988, Ch.412) and is located in the basement of the Tompkins County Courthouse in Ithaca.

Originally one of the smallest libraries, the collection has grown to more than 5000 volumes in a variety of formats: print, microform, audio, video, and CD-ROM. Open and staffed Monday through Friday from 9:00 a.m. - 5:00 p.m., the library also provides a coin-operated photocopier for public use as well as interlibrary loan service. In addition, one can reach the library at 607-272-0045 or by fax at 607-272-3276.