Joann Lõssov (10 September 1921 – 3 August 2000), also known as Ioann Fyodorovich Lysov (Russian: Иоанн Фёдорович Лысов), was an Estonian basketball player.

Member of the Soviet Union basketball team in 1947–52, from 1949, the captain and points guard.

After his career as a player, worked as the head coach of the Soviet Union women’s team in 1953–58 (gold medals from the European Championships of 1954 and 1956) and helped to organise special trainings of the Soviet Union team.

Elected to the Hall of fame of Estonian basketball in 2010.

Lõssov played with the senior Soviet Union men's national basketball team at the 1952 Summer Olympics, where he won a silver medal.