Hans Hermann Wilhelm Groër OSB was an Austrian Cardinal of the Roman Catholic Church. He served as Archbishop of Vienna from 1986 to 1995, and became a cardinal in 1988. Pope John Paul II replaced him as archbishop after multiple allegations of sexual abuse of children, and at John Paul's request Groër relinquished all ecclesiastical duties and privileges as an archbishop and cardinal on 14 April 1998.

The Archbishop of Vienna is the prelate of the Roman Catholic Archdiocese of Vienna who is concurrently the metropolitan bishop of its ecclesiastical province which includes the dioceses of Eisenstadt, Linz and St. Pölten.