The Yugoslav football league system refers to the system of interconnected leagues in association football which was in place during the existence of Yugoslavia and organized by the Football Association of Yugoslavia (FSJ).
The exact formats and numbers of levels changed several times, the last time in 1988, when the four inter-republic groups were introduced at third level.
The following table shows the structure as it was employed in the 1990–91 season, the last season before Slovenian and Croatian clubs departed after their countries declared independence.
Bosnian and Macedonian clubs also abandoned the system during and after the following 1991–92 season.
Serbia and Montenegro stayed unified as FR Yugoslavia and continued competing together all the way until 2006.