Oriental Theological Seminary (OTS) is a Christian religious educational institution situated in , Chümoukedima District, Nagaland. It was founded in 1991 by Nagaland Baptist Church Council (NBCC). Wati Aier was the first Principal of the institution. In September 2017, Dr. Joshua Lorin took the reins as the Principal from Aier. Courses offered by the institution are Master of Divinity and Master of Theology.