1989–90 1. Slovenská národná hokejová liga season

The '''1989–90 1. Slovenská národná hokejová liga season''' was the 21st season of the 1. Slovenská národná hokejová liga, the second level of ice hockey in Czechoslovakia alongside the 1. Česká národní hokejová liga. 12 teams participated in the league, and Slovan ChZJD Bratislava won the championship and were promoted to the Czechoslovak First Ice Hockey League. Plastika Nitra was also promoted.