The Hopewell Branch Library is a part of the Mercer County Library System that serves 2,793 residents of Pennington in Mercer County. The library maintains 672,382 volumes and circulates over 1.9 million items per year. Hopewell Branch provides audiovisual materials, technology, and a variety of programs, including Book Clubs, Pregnancy & Postpartum Support groups, Workshops, Chess Club, Preschool STEAM, Medicare Information Sessions, Word Classes, and Poetry Reading.