The Catholic Church in the United States is divided into 195 jurisdictional regions called dioceses or archdioceses, which are administered by bishops or archbishops. Each diocese is divided into parishes. There are approximately 18,000 parishes in the United States serving roughly 68 million Catholics. Each diocese is uniquely structured and staffed. In many dioceses, the chancellor or vicar for religious serves as the diocesan coordinator (PDF) for the annual appeal for the Retirement Fund for Religious. Most dioceses have their own websites, and you can find further information about your diocese there.
The National Religious Retirement Office is headquartered within the United States Conference of Catholic Bishops (USCCB) in Washington, D.C. The USCCB comprises Catholic bishops and archbishops in the United States and the U.S. Virgin Islands. With a staff of approximately 315 priests, deacons, religious, and lay people, the USCCB operates to uphold and promote Catholic Church teachings and to empower Christian service. According to the USCCB website, the USCCB strives "to unify, coordinate, promote, and carry on Catholic activities in the United States; to organize and conduct religious, charitable, and social welfare work at home and abroad; to aid in education; to care for immigrants."