John Joseph Scanlan, Irish-American bishop (b. 1930)
John Joseph Scanlan (May 24, 1906 – January 31, 1997) was the second Bishop of the Catholic Diocese of Honolulu in the United States.

Born in Iniscarra in County Cork, Ireland, Scanlan trained at All Hallows College, Dublin.

On July 8, 1954, Scanlan was appointed Auxiliary Bishop of Honolulu and Titular Bishop of Cenae. On September 21 of that year, Scanlan's episcopal consecration took place. On November 10, 1967, Scanlan was appointed Apostolic Administrator of Honolulu and took charge of the administration of the diocese.

On March 6, 1968, he was appointed the Bishop of the Diocese of Honolulu. On June 30, 1981, Scanlan retired but continued to be active as Bishop Emeritus.