Sixteen teams participated in the 2017–18 Cypriot Third Division.
All teams will play 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 three teams were promoted to the 2017–18 Cypriot Second Division and the last three teams were relegated to the 2017–18 STOK Elite Division.
Teams promoted to 2017–18 Cypriot Second Division Teams relegated from 2016–17 Cypriot Second Division Teams promoted from 2016–17 STOK Elite Division Teams relegated to 2017–18 STOK Elite Division