The 2018–19 Aris Thessaloniki B.C. season was the 65th appearance in the top-tier level Greek Basket League for Aris Thessaloniki. The club also competed in the Greek Basketball Cup where was eliminated by Promitheas Patras in Phase 2. In Europe Aris Thessaloniki was eliminated in Second qualifying round of Basketball Champions League by Russian Nizhny Novgorod. As a loser of BCL's qualifying rounds the club participated in FIBA Europe Cup. Aris Thessaloniki finished in 3rd place of Group G in Regular season and was eliminated.