Blessed Symeon Lukach (Ukrainian: Симеон Лукач; 7 July 1893 - 22 August 1964) was a Ukrainian Greek Catholic bishop and martyr.
Lukach was born in the village of Starunya, Stanislaviv Region. His parents were peasant farmers. He entered the seminary in 1913. His studies were interrupted for two years during World War I, he finished in 1919. In that year he was ordained a priest by Bishop Hryhory Khomyshyn. He taught moral theology at the seminary in Stanislaviv until April 1945 when Khomyshyn ordained him a bishop.
He was first arrested on 26 October 1949 by the NKVD and deported to Siberia for ten years hard labor. After serving half his sentence, he was released on 11 February 1955. After this, he served as an underground member of the clergy. In July 1962 he was arrested for a second time. He appeared in court with Bishop Ivan Sleziuk who was also an underground bishop. He was sentenced to five more years of labor. While he was in prison, he developed tuberculosis. He was released back to his village where he died on 22 August 1964.
He was beatified on 27 June 2001 by Pope John Paul II.