1989–90 Cypriot Third Division

The 1989–90 Cypriot Third Division was the 19th season of the Cypriot third-level football league. APEP Pelendriou won their 1st title.

Format
Fourteen teams participated in the 1989–90 Cypriot Third Division. All teams played against each other twice, once at their home and once away. The team with the most points at the end of the season crowned champions. The first two teams were promoted to 1990–91 Cypriot Second Division. The last three teams were relegated to the 1990–91 Cypriot Fourth Division.

Point system
Teams received two points for a win, one point for a draw and zero points for a loss.