 William McNaughton was consecrated a bishop on August 24, 1961, by Cardinal Richard Cushing of Boston in St. Mary's Church, Lawrence, Massachusetts.The principal co-consecrators were Bishops John Comber, M.M., the Maryknoll Superior General, and Petrus Canisius van Lierde, O.S.A., the Vicar General of the Vatican State.A year later on March 10, McNaughton was named the first bishop of the Diocese of Incheon.