The 2017–18 season was the 117th season in Società Sportiva Lazio's history and their 30th consecutive season in the top-flight of Italian football.

Lazio competed in Serie A, the Coppa Italia and the Europa League.

Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.

Players may hold more than one non-FIFA nationality.

Source: Competitive matches