Tito Fritiof Colliander (10 February 1904 – 21 May 1989) was a Finnish Eastern Orthodox Christian writer.

Beginning in the 1930s, Colliander published a number of novels and short stories that made him famous.

His books were written under the strong influence of Dostoyevsky's frequent themes of guilt and searching for faith in the modern world.

[1] Colliander and his wife Ina converted to Orthodoxy, and the writer attended the Orthodox seminary from 1949 to 1953.

He also wrote a memoir of life in Tsarist Russia and Finland in a pre-war book about Ilya Repin.