The Most Reverend Stephen Peter Alencastre SSCC | |
|---|---|
| Vicar Apostolic of Hawaiian Islands | |
 Bishop Alencastre, c. 1910. | |
| Church | Roman Catholic |
| See | Titular Bishop of Arabissus |
| In office | 1926-1940 |
| Predecessor | Libert H. Boeynaems |
| Successor | James Joseph Sweeney |
| Orders | |
| Ordination | 5 April 1902 |
| Consecration | 24 August 1924 by John Joseph Cantwell |
| Rank | Bishop |
| Personal details | |
| Born | November 3, 1876 |
| Died | November 9, 1940 (aged 64) En route to Los Angeles, California |
| Nationality | Portuguese |
| Coat of arms |  |
Bishop Stephen Peter Alencastre, SSCC (born Estêvão Pedro de Alencastre; November 3, 1876 – November 9, 1940) was a bishop of the Roman Catholic Church who served as the fifth and last Vicar Apostolic of the Vicariate Apostolic of the Hawaiian Islands (now the Diocese of Honolulu). He was also an apparent titular bishop of Arabissus.