The 2018–19 Nemzeti Bajnokság I (known as the K&H férfi kézilabda liga for sponsorship reasons) is the 68th season of the Nemzeti Bajnokság I, Hungarian premier Handball league.
After the 2017–18 season, Váci KSE and Orosházi FKSE were relegated to the 2018–19 Nemzeti Bajnokság I/B.
They were replaced by two clubs from the 2017–18 Nemzeti Bajnokság I/B; Mezőkövesdi KC and Vecsés SE.
Following is the list of clubs competing in 2018–19 Nemzeti Bajnokság I, with their president, head coach, kit manufacturer and shirt sponsor.
Telekom Veszprém won the Finals, 62–51 on aggregate.