2017–18 TFF First League

The 2017–18 TFF First League is the 17th season since the league was established in 2001 and 55th season of the second-level football league of Turkey since its establishment in 1963–64.

Teams

 * Rizespor, Gaziantepspor and Adanaspor relegated from 2016–17 Süper Lig.
 * Sivasspor, Yeni Malatyaspor and Göztepe promoted to 2017–18 Süper Lig.
 * İstanbulspor, Erzurum BB and Ankaragücü promoted from 2016–17 TFF Second League.
 * Şanlıurfaspor, Bandırmaspor and Mersin İdmanyurdu relegated to 2017–18 TFF Second League.

Semifinals

 * }