Geevarghese Mar Osthathios (9 December 1918 – 16 February 2012) was a senior bishop of the Indian Orthodox Church.
He received the order of Korooyo (reader) from Metropolitan Augen Mar Timotheos on 9 August 1947 and his priesthood from Baselios Geevarghese II, Catholicos on 10 May 1956.
Metropolitan Daniel Mar Philexinos ordained him as a Ramban, at St. Mary's Cathedral Puthencavu.
He was consecrated as a bishop by Baselios Augen I, Catholicos of the East on 16 February 1975, at Niranam Valiya Palli.
He is the founder of a good number of charitable programmes, mission centers and institutions which include Marriage Assistance Foundation, Sick Aid Foundation, Save A Heart Foundation, House Building Aid Fund, Mission Training Centre, M.G.D Ashram Balabhavan Karunagiri, St. Paul's Asram Puthuppady, Haripad Mission Centre, Yacharam St. Gregorios Balagram, Bethanya Bhavan, St. George Balikagram Pune, etc.