Co-cathedral of Santa María de la Fuente la Mayor
Native name Spanish: Concatedral de Santa María de la Fuente la Mayor
Location	Guadalajara, Spain
Coordinates	40°38′08″N 3°09′41″W / 40.635556°N 3.161389°W / 40.635556; -3.161389
Spanish Cultural Heritage
Official name	Concatedral de Santa María de Guadalajara-Iglesia de Santa María la Mayor o de la Fuente
Type	Non-movable
Criteria	Monument
Designated	1941
Reference no.	RI-51-0001110
Location of Co-cathedral of Santa María de la Fuente la Mayor in Spain

The Co-cathedral of Santa María de la Fuente la Mayor (Spanish: Concatedral de Santa María de la Fuente la Mayor) is a co-cathedral located in Guadalajara, in Castile-La Mancha, Spain. It is in the Roman Catholic Diocese of Sigüenza-Guadalajara.

The building is in mudejar style. It was declared Bien de Interés Cultural in 1941.^{[citation needed]}