The Roman Catholic Diocese of Hamilton in Bermuda (Latin: Dioecesis Hamiltonensis in Bermuda) is a diocese of the Latin Church of the Catholic Church in North America.

The diocese comprises the entirety of the dependency of Bermuda.

The diocese is a suffragan of the Archdiocese of Nassau, and a member of the Antilles Episcopal Conference.

The diocese of Hamilton was erected in 1953 out of the Archdiocese of Halifax-Yarmouth in Nova Scotia, Canada (Bermuda having historically been part of British North America) as the Prefecture Apostolic of Bermuda Islands.

[1] It was elevated to an apostolic vicariate in January 1956 and to the Diocese of Hamilton in Bermuda in June 1967.