The 2018 Superettan was part of the 2018 Swedish football season, and the 19th season of Superettan, Sweden's second-tier football division in its current format.
All teams are obligated to have the logo of the league sponsor Svenska Spel as well as the Superettan logo on the right sleeve of their shirt.
Note: Flags indicate national team as has been defined under FIFA eligibility rules.
Players and Managers may hold more than one non-FIFA nationality.
The 13th-placed and 14th-placed teams of Superettan meet the two runners-up from 2018 Division 1 (Norra and Södra) in two-legged ties on a home-and-away basis with the team from Superettan finishing at home.