The Roman Catholic Diocese of Joliet in Illinois serves 655,000 parishioners in 120 parishes & 10 missions. Each year, we serve 39,000 students in 68 schools & 3 universities, 760,000 patients in 3 hospitals, and 36,000 needy in the counties of DuPage, Ford, Grundy, Iroquois, Kankakee, Kendall, and Will.