The 2019–20 Nemzeti Bajnokság I (also known as 2019–20 OTP Bank Liga), also known as NB I, was the 121st season of top-tier football in Hungary.
The league was officially named OTP Bank Liga for sponsorship reasons.
[1] MTK Budapest and Szombathelyi Haladás finished the 2018–19 Nemzeti Bajnokság I in the last two places and thus were relegated to NB II division.
Since February 2019, all teams participating in the NB I are sponsored by the national betting office Tippmix.
Note: Flags indicate national team as has been defined under FIFA eligibility rules.