The Hubbard Free Library is the public library serving Hallowell, Maine. Built in 1879-80, it is the oldest library building in Maine built for that purpose. It was designed by architect Alexander C. Currier to resemble an English country church. Dedicated in 1880 as the Hallowell Library, it was renamed the Hubbard Free Library in 1894, after a $20,000 donation from philanthropist Thomas Hubbard. The building is a contributing property in the Hallowell Historic District.