The Save Romania Union (Romanian: Uniunea Salvați România, USR) is a liberal political party in Romania. It is the fourth-largest party in the Parliament of Romania, holding 40 seats in the Chamber of Deputies and 20 in the Senate. The party was founded following the success of the Save Bucharest Union (USB) party in the 2016 local elections.

After being officially registered as a political party in 2016, it united with the local USB and Union for Codlea parties, thus gaining most of its initial membership base from the two latter parties.

Between 2016 and 2020, it was the third largest political party in the Romanian Parliament after the 2016 legislative elections and ran on an anti-corruption platform. In 2019, it established a political alliance with the Freedom, Unity and Solidarity Party (PLUS) led by former technocratic Prime Minister Dacian Cioloș which it eventually absorbed in 2021. Dacian Cioloș, who was also subsequently elected president of the party but who resigned in the meantime from this position, left the USR with a group of followers (most notably several MEPs) in late May 2022 in order to form his own party called REPER.

USR continued the political project Save Bucharest Union (Romanian: Uniunea Salvați Bucureștiul) at the national level, established on 1 July 2015. At the Save Bucharest Union (USB) kick off conference talking about goals of the new movement, Nicușor Dan stated:

"We are addressing to an entire category of people disappointed on how politics was done so far and, in Bucharest, we are addressing to those cores citizens who began to fight for their rights. (...) We will continue fighting with the public administration of Bucharest. We will talk any time about bizarre spending of the public money, about illegalities, or about the comfort of living or lack of it. We will also come with our vision and our project for Bucharest. We are not distinguishable in the ideological context. What we want to do is very simple, there are several problems we want to solve"

Besides Nicușor Dan, the founding members of the Save Bucharest Union were Ioan Miloș, Alina Vernon, Dan Podaru, and Argentina Traicu, the last two have retreated as founding members and from the Initiative Committee in January 2016.

On 23 February 2016, Nicușor Dan published on his Facebook account the document „Programul pentru București al candidatului Nicușor Dan (Uniunea Salvați Bucureștiul) la Primăria Generală” ("The Bucharest program of the candidate Nicușor Dan (Save Bucharest Union) at the General City Hall"), which he submitted to the public debate. In 2016, at the local elections held that year, the Save Bucharest Union had obtained a score of 25% in Bucharest and was ranked in second place according to Bucharest's preferences.

On 21 August 2016, Save Bucharest Union (USB) merged with the Union for Codlea and Save Romania Union, the new formation bearing the name Save Romania Union, and participated in the parliamentary elections held in 2016. During the merger congress, Nicușor Dan was elected the president of the party, the vice presidents became Cristian Ghica, Clotilde Armand, Dumitru Dobrev, Roxana Wring, and Erwin Albu. For the legislative elections, Nicușor Dan has predicted at least 10% of votes for the new formation. Officially, the merger process has been hampered by numerous appeals, filed by PSD, PER, and private individuals. By a decision of 29 December 2016 issued by the Bucharest Court of Appeal, the merger remained final.