He has two ecclesiastical seats: the Cathedral Basilica of Our Lady of Peace and the Co-Cathedral of Saint Theresa of the Child Jesus, both located in the City of Honolulu.
Previous to the canonical elevation of the Diocese of Honolulu, a single priest led what was the Prefecture Apostolic of the Sandwich Islands.
Under civil laws, the Bishop of Honolulu acts as president of the Roman Catholic Church in Hawaii as corporation sole.
Efficient administration necessitated the creation of several vicariates served by vicars forane directly subordinate to the Bishop of Honolulu.
Bishop Sweeney was buried in his family crypt in Holy Cross Cemetery in Colma, California.
The location of the remains of the Vicar Apostolic of Oriental Oceania, Bishop Etienne Jerome Rouchouze are unknown.