2017 French Socialist Party presidential primary

Socialist Party presidential primary, 2017
	Results of the first round by department and region
	Results of the second round by department and region
Previous Socialist nominee; François Hollande;	Presumptive Socialist nominee ; Benoît Hamon

The French Socialist Party held a two-round presidential primary to select a candidate for the 2017 presidential election on 22 and 29 January 2017. It was the second open primary (primaires citoyennes) held by the center-left coalition, after the primary in 2011 in which François Hollande defeated Martine Aubry to become the Socialist nominee. Hollande went on to defeat incumbent Nicolas Sarkozy in the 2012 presidential election. However, because of his low approval rating, he announced that he would not seek re-election, becoming the first president of the Fifth Republic to decide not to run for a second term. The primary was contested by seven candidates, four from the Socialist Party and three representing other parties part of the left-wing electoral alliance (la Belle Alliance populaire).

The three frontrunners in the first round of the primary were Manuel Valls, who served as Hollande's Prime Minister from 2014 to 2016 and interior minister from 2012 to 2014; Benoît Hamon, Minister of National Education in 2014; and Arnaud Montebourg, Minister of the Economy, Production Recovery and the Digital Sector from 2012 to 2014. On 22 January, Hamon received 36.03% and Valls 31.48% of the vote in the first round and advanced to the runoff, far ahead of all other candidates and well ahead of Montebourg, who was eliminated and immediately endorsed Hamon. In the runoff, Hamon easily defeated Valls, beating the ex-PM by nearly 20 percentage points, and officially took the mantle as nominee of the PS in the 2017 presidential election.