Leo Sepp (7 November 1892 in Simuna, Estonia – 13 December 1941 in Solikamsk, Russia, USSR) was an Estonian politician, businessman and writer.

[1] From 1921 until 1924, he was the director and chairman of the Bank of Estonia.

[1] In 1937, using the pen name Rein Sarvesaare, Sepp wrote a theatre play Kaupo; and it was published by the Estonian Academic Artists' Association (EAKK).

[2] Following the Soviet occupation of Estonia in 1940, Sepp was arrested by the NKVD, deported to Soviet Russia, and imprisoned in the Gulag camp system.

He died in custody in Solikamsk, Perm Oblast, Russia in 1941.