Otto Friedrich Ignatius (28 July 1794, Hageri - 7 September 1824, Saint Petersburg) was a Baltic-German painter, writer, and composer.
His father, David Friedrich Ignatius [de], was a parish priest and theologian, who founded a school where he received his first drawing lessons.
He held that position until 1824, when he died of tuberculosis, shortly after the death of his wife, Adelheid, to whom he had been married for only a little more than a year.
What would have been his greatest work, a wall painting in the church at Tsarskoye Selo, was left unfinished when he died.
He was also an amateur writer, producing poems and dramas; including a tragedy on the life of Marino Faliero (1824).