The Southern Front (Arabic: الجبهة الجنوبية) was a Syrian rebel alliance consisting of 54 or 58 Syrian opposition factions affiliated with the Free Syrian Army, established on 13 February 2014 in southern Syria. By June 2015, the Southern Front controlled about 70 percent of Daraa Governorate, according to the International Institute for Strategic Studies; by 2018, the front was defunct, with most of its fighters either reintegrating into the Syrian Army or fleeing to other FSA held lands in the north.

Claims have been made by the Southern Front itself, and by media in Britain, Germany, and the United Arab Emirates, that the Southern Front was funded by the US and its allies, possibly through a US-led Military Operations Center (MOC) based in Amman, Jordan. Since its formation, rebels said field operation rooms have been added inside Syria to improve coordination between units. The coalition was described by Western officials as "the best organized of the mainstream opposition". The constituent groups ranged from secularist groups to moderate religious groups, and the Southern front has been described as a "non-hardline Islamist rebel group" that rejects extremism.

The Southern Front is an alliance of over 50 rebel groups, ranging from secularist to moderately religious. Bashar al-Zoubi, head of the Yarmouk Army, said to the BBC in 2014 that the groups or factions of the Southern Front are militarily coordinated by a moving command center with a unified leadership but with no overall commander and no centralised command—which is contradictory.

The Carter Center, a private organization in the U.S. promoting human rights globally, in February 2015 also described the Southern Front as a loose coalition of self-described moderate armed groups without leadership or organizational structure, that agreed on the name ‘Southern Front’ to receive support from the inter-governmental Friends of Syria through the southern MOC ("Military Operations Center") in Amman.

The relationship between the Southern Front and the Syrian armed rebel group Free Syrian Army (FSA) has been described differently by different news sources. Remarks of news sources about such relation are in some cases more or less compatible, in other cases incompatible. Some statements in chronological order:

In mid-February 2014, according to a Syrian rebel brigade officer, the Military Operations Command (MOC) in Jordan designed for channeling Western and Gulf aid to moderate rebel forces in southern Syria convened a meeting with leaders of nearly 50 southern rebel groups and directed them to create a new umbrella coalition. This resulted in the "Southern Front" being formed on 13 February 2014.

The formation of the front and its backing by Western forces challenged al-Nusra's military and political success in the region, though Southern Front units continued to cooperate with al-Nusra forces.

The Southern Front quickly became the largest rebel fighter umbrella organization in Southern Syria, comprising 25–30,000 fighters, the great majority of the South's rebel groups and manpower.