The Boonton Public Library, also known as the Holmes Library, is located at 619 Main Street in the town of Boonton in Morris County, New Jersey. Built c. 1849, the Greek Revival building was purchased by James Holmes in 1856 and became the public library in 1893. It was added to the National Register of Historic Places on November 13, 1972, for its significance in communications, education, and social history. It was added as a contributing property to the Boonton Historic District on September 29, 1980.