The 1989–90 season was the 90th season in the existence of SS Lazio and the club's second consecutive season in the top flight of Italian football. In addition to the domestic league, Lazio participated in this season's edition of the Coppa Italia.

Squad

Competitions Serie A

League table

Results summary

Results by round

Matches

Topscorers Amarildo 8 Rubén Sosa 8 Gabriele Pin 6 Paolo Di Canio 3

Coppa Italia

First round

Second round

Notes

References