Joonas Riismaa (born 6 March 2002) is an Estonian professional basketball player who last played for New Basket Brindisi of the Lega Basket Serie A (LBA).

[2] In 2018, he signed a junior contract with Pistoia Basket.

On 11 July 2022, Riismaa signed a contract with Happy Casa Brindisi of the Lega Basket Serie A (LBA) and the FIBA Europe Cup.

[4] Riismaa helped the Estonian U20 national team win the bronze medal at the Division B tournament of the 2022 FIBA U20 European Championship.

This biographical article relating to an Estonian basketball figure is a stub.