The Diocese of Osimo was a Roman Catholic diocese in Italy.
It was founded in the seventh century and in 1725 merged with the Diocese of Cingoli to form the Diocese of Osimo e Cingoli.
It was contained within the Papal States.
Erected: 7th Century
Latin Name: Auximanus
19 August 1725: United with the Diocese of Cingoli
Immediately Subject to the Holy See
25 January 1985: The former Diocese of Cingoli was split from the Diocese of Osimo e Cingoli and united with the Diocese of Macerata e Tolentino, the Diocese of Recanati, and the Diocese of San Severino (-Treia) to form the Diocese of Macerata-Tolentino-Recanati-Cingoli-Treia.
30 September 1986: the Diocese of Osimo was united with the Archdiocese of Ancona to form the Archdiocese of Ancona-Osimo
This article incorporates text from a publication now in the public domain: Herbermann, Charles, ed. (1913). "". Catholic Encyclopedia. New York: Robert Appleton.