The 2018–19 Nemzeti Bajnokság I/A (in English: National Championship I/A) was the 88th season of the Nemzeti Bajnokság I/A, the highest professional basketball league in Hungary. Szolnoki Olaj was the defending champion. The season ended on 21 June 2019, when Falco Vulcano won its second national championship after sweeping Egis Körmend in the finals.