2018–19 Korisliiga season

Karhu successfully defended their title to repeat as Finnish national champions.

The eight best qualified teams joined the playoffs and the last one played a best-of-three relegation playoff against the First Division runners-up.

Ura promoted from First Division and Kobrat remained in the league as Espoo United was expelled due to financial irregularities.

[1][2] The quarter-finals and semi-finals were played in a best-of-three 1–1–1–1–1 format with re-seeding in the semifinals.

The finals were played in a best-of-seven playoff format.