| Competition: | TFF Third League |
| Season: | 2012–13 |
| Winners: | 1: Diyarbakır BBSK 2: Aydınspor 1923 3: Altınordu |
| Promoted: | 1: Pazarspor 2: Dardanelspor 3: Gümüşhanespor |
| Relegated: | 1: Kastamonuspor, Beşikdüzüspor, Çorumspor 2: Kilimli Belediyespor, İskenderunspor 1967, Gebzespor 3: Isparta Emrespor, Diyarbakırspor, Mardinspor |
| League Topscorer: | 1: Timur Kosovalı (Kayseri Şekerspor) 19 2: Özer Kutlu (Ümraniyespor) 22 3: Doğan Karakuş (Kocaelispor) 22 |
| Biggest Home Win: | TBD |
| Biggest Away Win: | TBD |
| Highest Scoring: | TBD |
| Prevseason: | 2011–12 |
| Nextseason: | 2013–14 |
The 2012–13 TFF Third League (also known as Spor-Toto Third League due to sponsorship reasons) is the 12th season of the league since its establishment in 2001 as the fourth level division; and the 42nd season of the third league in Turkish football since its establishment in 1967–68 (before 2001 league was played as third level division). The start date of the league is 8 September 2012 and end date is 19 May 2013.
League was started with 54 teams in three groups: Groups 1, 2 and 3, each consisting 18. Winner of each group promoted to 2013–14 TFF Second League. A playoff series was played among the best four teams in each group to determine the three more teams to promote. Bottom three teams in each groups relegated to 2013–14 Turkish Regional Amateur League.[1]