The Roman Catholic Diocese of Celaya (Latin: Dioecesis Celayensis) (erected 13 October 1973) is a suffragan diocese of the Archdiocese of León. It was a suffragan of the Archdiocese of San Luis Potosí until 25 November 2006.

• Victorino Alvarez Tena (1974–1987)
• Jesús Humberto Velázquez Garay (1988–2003)
• Lázaro Pérez Jiménez (2003–2009)
• Benjamín Castillo Plascencia (2010–2021)
• Víctor Alejandro Aguilar Ledesma (2021–present)

• Gonzalo Alonso Calzada Guerrero, appointed Auxiliary Bishop of Antequera, Oaxaca in 2012

• Celaya, Guanajuato

• Immaculate Conception Cathedral, Celaya

• Diócesis de Celaya official site
• "Diocese of Celaya". Catholic-Hierarchy. Retrieved 2007-02-06.

20°31′20″N 100°48′43″W / 20.5223°N 100.8119°W / 20.5223; -100.8119