The United Democratic Front (Juba Arabic: جبهة الديمقراطية المتحدة Jabhet Al-Dimoqratiyet Al-Mutahedat) is a political party in South Sudan.

It was previously the main opposition party in the country since the Republic of South Sudan achieved its independence in 2011.

In October 2013, he was released through a presidential amnesty issued by Salva Kiir Mayardit the president of the Republic of South Sudan.

UDF, under the leadership of Lawrence, participated in the 2018 peace negotiations in both Addis Ababa, Ethiopia, and Khartoum, Sudan.

These negotiations resulted in the signing of the Revitalized Agreement on Resolution of Conflict in the Republic of South Sudan (R-ARCSS) in September 2018.