The Social Democratic Party of Serbia (Serbian: Социјалдемократска партија Србије, romanized: Socijaldemokratska partija Srbije, abbr.

Orientated towards the principles of social democracy, it has been led by Rasim Ljajić since its formation in 2009.

[1] In late 2013 SDPS had joined in coalition with the Sandžak Democratic Party, forming a political union.

[2] Despite taking part with the Democratic Party-led Choice for a Better Life alliance in the 2012 Serbian parliamentary election, SDPS has aligned itself with the Serbian Progressive Party (SNS) after the election.

[1] SDPS is a centre-left political party, orientated towards the principles of social democracy.