The Roman Catholic Diocese of Tulcán (Latin: Dioecesis Tulcanensis) is a diocese located in the city of Tulcán in the ecclesiastical province of Quito in Ecuador.

• Luis Clemente de la Vega Rodriguez (17 Mar 1965 – 4 May 1987)
• Germán Trajano Pavón Puente (28 Jan 1989 – 19 Apr 2001), appointed Bishop of Ambato
• Luis Antonio Sánchez Armijos, S.D.B. (15 Jun 2002 – 22 Feb 2010), appointed Bishop of Machala
• Fausto Gaibor García (4 May 2011 – 4 Jun 2021)
• Luis Bernardino Núñez Villacís (5 Jul 2021 – 6 Aug 2021; did not take effect)
• Carlos Washington Yépez Naranjo (16 May 2023 – present)

• GCatholic.org
• Catholic Hierarchy

0°48′42″N 77°43′7″W / 0.81167°N 77.71861°W / 0.81167; -77.71861