The 2017–18 Nemzeti Bajnokság I (known as the K&H férfi kézilabda liga for sponsorship reasons) is the 67th season of the Nemzeti Bajnokság I, Hungarian premier Handball league.
After the 2016–17 season, Balmazújvárosi KK and Mezőkövesdi KC were relegated to the 2017–18 Nemzeti Bajnokság I/B.
They were replaced by two clubs from the 2016–17 Nemzeti Bajnokság I/B, Ferencvárosi TC and Dabas KK.
Following is the list of clubs competing in 2017–18 Nemzeti Bajnokság I, with their president, head coach, kit manufacturer and shirt sponsor.
1: Team played last season in Nemzeti Bajnokság I/B.