The Diocese of Trenton is a Roman Catholic diocese located in New Jersey, serving the spiritual needs of Catholics in the region. Established in 1881, it encompasses several counties, including Mercer, Burlington, and Ocean. The diocese is part of the Province of Newark and is led by a bishop who oversees various parishes and ministries. The diocese focuses on promoting faith, education, and community service. It operates numerous schools, religious education programs, and charitable organizations to support its mission. The Cathedral of St. Mary in Trenton serves as the diocese's central church and a hub for various liturgical events.