| Competition: | Nemzeti Bajnokság I |
| Season: | 2002–03 |
| Dates: | 26 July 2002 – 31 May 2003 |
| Winners: | MTK Budapest |
| Relegated: | Kispest Honvéd Dunaferr |
| Continentalcup1: | Champions League |
| Continentalcup1 Qualifiers: | MTK Budapest |
| Continentalcup2: | UEFA Cup |
| Continentalcup2 Qualifiers: | Ferencváros Debrecen |
| Continentalcup3: | Intertoto Cup |
| Continentalcup3 Qualifiers: | Győr Videoton |
| League Topscorer: | Krisztián Kenesei (23) |
| Biggest Home Win: | Debrecen 6–1 Békéscsaba |
| Biggest Away Win: | Békéscsaba 0–5 Sopron |
| Highest Scoring: | Siófok 5–3 Debrecen Kispest 3–5 MTK |
| Matches: | 192 |
| Total Goals: | 584 |
| Prevseason: | 2001–02 |
| Nextseason: | 2003–04 |
The 2002–03 Nemzeti Bajnokság I, also known as NB I, was the 101st season of top-tier football in Hungary. The league was officially named Borsodi Liga for sponsoring reasons. The season started on 26 July 2002 and ended on 31 May 2003.
It was contested by 12 teams, and MTK Hungária FC won the championship under Sándor Egervári.MTK won the league on the last day of the season, at Újpest's stadium, Megyeri Road. The white and blues defeated Újpest 1-0, while Ferencváros were unable to overcome Debrecen, and had to settle for a 2nd place finish.
Budapest Honvéd suffered a relegation for the first time in their history. Their drop to the division below was confirmed on the 23rd of May, after losing 3-1 at defending champions Zalaegerszeg.
