Sergei A Mezheninov (January 19, 1890 – September 28, 1937) was a Soviet komkor (corps commander).
He fought for the Imperial Russian Army during World War I before going over to the Bolsheviks during the subsequent civil war.
During this war, he commanded the 3rd, 12th and 15th Red Army.
At the time of the Great Purge, Mezheninov was arrested after a suicide attempt on June 20, 1937.
He was accused of spying for Nazi Germany, convicted and later executed.