The 2012–13 Liga III season is the 57th season of the Liga III, the third tier of the Romanian football league system.
The first team in each series will promote at the end of the season to the Liga II, and the teams that finish 10-16 will relegate to the Liga IV.
From the teams that finish 9th, another three are relegated, but separate standings are computed, only results against teams that finished 1-8 are taken into consideration.
From the 78, 5 withdrew from the championship during the first half, CSO Plopeni, Sevișul Șelimbăr, Oltchim Râmnicu Vâlcea, FCM Huși and FC Cisnădie, thus 73 remained in the tables.
This teams were: Young Stars Panciu, Rapid București II, Eolica Baia, CSM Focșani, Jiul Petroșani, FCM Turda and Girom Albota.