Feodosia Prokopiyevna Morozova (Russian: Феодосия Прокопьевна Морозова; née Sokovnina (Соковнина); 21 May 1632 – 1 December 1675) was a Russian noblewoman and one of the best-known partisans of the Old Believer movement.
She was perceived as a martyr after she was arrested and died in prison. She was praised in pamphlets shortly after her death, hailed as a rebel by revolutionaries in the 19th century, and is to this day hailed as a holy martyr by the Old Believers.