Theoktistos was a hierarch of the Church in Rus' who served as Archbishop of Novgorod in the early fourteenth century. Before his elevation to the episcopate he was igumen (abbot) of the Annunciation Monastery near Novgorod. After the repose of Archbishop Clement in 1300, he was chosen as Clement's successor and consecrated Archbishop of Novgorod on June 29, 1300.
His tenure was marked by the construction and renovation of churches. According to the synaxarion he consecrated cathedrals dedicated to the Passion-bearers Boris and Gleb and to the Holy Fathers of the First Ecumenical Council, and he improved the condition of the Monastery of Valaam. He also acted as a mediator in the conflict between Prince Michael of Tver and Novgorod; the resulting agreement was recorded in a document known as the Theoctist Charter, which bore the signature and seal of the archbishop.
Because of declining health, Theoktistos withdrew in 1307 to the Annunciation Monastery, where he had earlier been abbot, and devoted his remaining years to the ascetic practice of silence and prayer. He reposed there on December 23, 1310. He was glorified in 1664 on account of the many miraculous healings reported at his tomb, and his relics were translated to Yuriev in 1786.