Since 1969 Rubicon has been a titular see of the Roman Catholic Church. It takes its name from the lapsed Diocese of Rubicón in Spain, previously a suffragan in the ecclesiastical province of the Archdiocese of Seville.

Titular Bishops of Rubicon
No. Name Office From To
1 Jaime Flores Martin Bishop emeritus of Barbastro-Monzón (Spain) 30 April 1970 11 December 1970
2 Oskar Saier Auxiliary bishop in Freiburg (Germany) 7 April 1972 15 March 1978
3 José Sánchez González Auxiliary bishop in Oviedo (Spain) 15 January 1980 11 September 1991
4 Stanisław Gądecki Auxiliary bishop in Gniezno (Poland) 1 February 1992 28 March 2002
5 Joaquín Carmelo Borobia Isasa Auxiliary bishop in Toledo (Spain) 21 October 2004 23 April 2022
6 Tomasz Grysa Apostolic Nuncio 27 September 2022
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