The Roman Catholic Diocese of Tanjung Selor () is a diocese located in the city of Tanjung Selor in the ecclesiastical province of Samarinda in Indonesia.
History January 9, 2002: Established as the Diocese of Tanjung Selor from the Diocese of Samarinda
Leadership Bishops of Tanjung Selor (Roman rite) Bishop Justinus Tarmana Harjosusanto, M.S.F. (January 9, 2002 – February 16, 2015) Bishop Paulinus Yan Olla, M.S.F. (May 5, 2018–present)
References GCatholic.org Catholic Hierarchy