2012–13 Iraq Division One
The 2012–13 Iraq Division One season began on December 8, 2012. Al-Sulaymaniya were the champions of the previous season and Naft Al-Junoob were runners-up, hence both promoted to the 2012–13 Iraqi Premier League.
Format and teams
The 42 teams were split into six groups. At the end of the regular season, the top 2 teams from each group, a total of 12 teams advanced to the next round. In the second round, these 12 teams will be split into two groups of 6, with teams playing a home and away round robin matches with each opponent in the group. The top two teams in each of the two groups advanced to the next round creating a 4 team playoff. The Final stage is one group with teams playing a home and away round robin matches with each opponent in the group. The top two teams qualify to the 2013–14 Iraqi Premier League next season.| Governorate | Teams | Name of Teams |
| Center | Center | Center |
| Baghdad | 4 | Al-Adala, Al-Hudood, Al-Jaish, and Al-Karkh |
| Salahaddin | 4 | Salahaddin, Samaraa, Al-Shirqat, and Al-Tuz |
| Middle Euphrates | Middle Euphrates | Middle Euphrates |
| Muthana | 1 | Al-Samawa |
| Najaf | 2 | Al-Kufa and Naft Al-Wasat |
| South | South | South |
| Maysan | 1 | Naft Maysan |