The 2009–10 season was the 77th season of competitive professional football in France.
The season began on 7 August 2009 for the Championnat National and Ligue 2 and on 8 August for Ligue 1 and the Championnat de France amateur. The season concluded on 14 May 2010 for Ligue 2, 15 May for Ligue 1, and 21 May for the Championnat National and the Championnat de France amateur.
On 12 May, it was announced that the 2009 Trophée des Champions will be played, for the first time, on international soil at Olympic Stadium in Montreal, Quebec, Canada. The match will contest the winners of the 2008–09 Coupe de France, Guingamp, and the 2008–09 Ligue 1 champions, Bordeaux, with the objective being to promote French professional football abroad.
On 5 June, it was announced that German sportswear company Puma will become the official provider of match balls for the upcoming season after agreeing to a long term partnership with the Ligue de Football Professionnel (LFP).
On 17 June, Marseille announced that they were parting ways with longtime chairman Pape Diouf. Diouf had been chairman of the club for five years and was the only black chairman ever to preside over a Ligue 1 club. Jean-Claude Dassier was announced as his replacement.