The 2002–03 A Group was the 55th season of the top Bulgarian national football league (commonly referred to as A Group) and the 79th edition of a Bulgarian national championship tournament.
It was contested by 14 teams, and CSKA Sofia won the championship.
Beroe, Belasitsa Petrich, and Spartak Pleven were relegated at the end of the last season.
These teams were Botev Plovdiv, Dobrudzha Dobrich, and Rilski Sportist Samokov.
Botev return after a one-year absence, Dobrudzha return after a two-year absence, while Rilski Sportist made their debut in the top tier of Bulgarian football.