Johannes Thiemann (born February 9, 1994) is a German professional basketball player for Gunma Crane Thunders of the Japanese B.League.

On June 3, 2016, Thiemann signed a two-year deal with MHP Riesen Ludwigsburg.

In 2016, Thiemann was selected for the German national basketball team, to play in the qualification rounds for the EuroBasket 2017.

[4] He won the 2023 FIBA World Cup with the German national basketball team.

Thiemann was born in Germany to a Cameroonian father and German mother.