The Defiance Public Library is a historic Tudor Revival library located on Fort Street in Defiance, Ohio. It was built in 1904 with funds from Andrew Carnegie and was designed by architects Wing & Mahurin. The building includes stained glass, a red sandstone facade, and picture windows overlooking the junction the Maumee and Auglaize Rivers and of the Defiance Fort Grounds. The building was listed on the National Register of Historic Places in 1985.