The Union of Reform Forces of Yugoslavia (Serbo-Croatian: Савез реформских снага Југославије, Savez reformskih snaga Jugoslavije; abbr.

СРСЈ or SRSJ) was a liberal political party in the SFR Yugoslavia led by Ante Marković that opposed the dissolution of Yugoslavia.

In Montenegro, it was the main opposition to the ruling Democratic Party of Socialists, as a coalition formed from the Liberal Alliance of Montenegro, Socialist Party of Montenegro, Social Democratic Party of Reformists, Independent Organization of Communists of Bar and Party of National Equality.

[7] In the Federation of Bosnia and Herzegovina, it was a basis for the Social Democrats, led by Selim Bešlagić, which merged into Social Democratic Party of Bosnia and Herzegovina.

In Slovenia, it was organized under the name Social Democratic Union (Socialdemokratska unija, SDU), but it failed to gain any significant weight in the political spectrum, remaining a small extra-parliamentary party.