The United Opposition of Serbia (Serbian: Удружена опозиција Србије, romanized: Udružena opozicija Srbije, UOPS) was a political coalition in Serbia. It was formed in August 2020 as the direct successor of Alliance for Serbia (SzS). The coalition included 11 parties and movements in total, including Đorđe Vukadinović as an independent individual. UOPS operated as a "confederation of political parties" and was the subject of inter-coalition conflicts that took place during its existence. It positioned itself as a coalition that opposed Aleksandar Vučić and sought to form a "democratic society" and free and fair elections, while it also supported the accession of Serbia to the European Union.