1989–90 I-Divisioona season
The 1989/90 season was the 16th season of the I- divisioona, the second highest Finnish ice hockey league. Ässät Pori and hockey Reipas Lahti qualified for the SM- liiga relegation in which both reached the climb. KooVee and Hokki Salo descended to the third tier.
Mode
In the main round each of the twelve teams completed a total of 44 games. The top two teams qualified for the SM- liiga relegation. The two last placed the main round rose from the third league. For a win, each team was given two points, a draw there was a point and a defeat.
Main Round
Table
Sp = Matches, W = Wins, D = Draws, L = Defeats