The Diocese of Chicago is a Roman Catholic diocese located in the city of Chicago, Illinois. It was established in 1843 and serves a diverse population of Catholics in the area. The diocese is part of the United States Conference of Catholic Bishops and is led by a bishop who oversees various parishes, schools, and ministries. The diocese is known for its commitment to social justice, education, and community service. It operates numerous schools and charitable organizations, aiming to support the spiritual and social needs of its members. The Archdiocese of Chicago is the larger ecclesiastical jurisdiction that encompasses the diocese.