Seraphim Chichagov (9 June 1856 or 9 January 1856 – 11 December 1937), born Leonid Mikhailovich Chichagov, was a Metropolitan bishop of the Russian Orthodox Church who was executed by firing squad, and was one of the first to be canonized by the Church in the 1990s as a New Martyr.
Born into a military family, he enlisted as an artillery officer after finishing his schooling.
Influenced by his experiences in the Russo-Turkish War and meetings with John of Kronstadt, he resigned from the military and became a clergyman.
He retired in 1933 due to age and ill health.
Four years later he was arrested and charged with monarchist propaganda.
Sentenced to death by firing squad, he was executed on 11 December 1937 at the Butovo firing range.