"Since the beginning of the flu epidemic (mid-January), the excess winter mortality - for all causes of death - is 19 per cent higher than expected (...), so an increase of 10,200 in deaths", said the French Institute for Public Health Surveillance (INVS) in a study released on Wednesday.
The French influenza epidemic has so far affected 2,8 million people in 2015.
France is not the only country to be affected with a deadly winter season flu.
According to the INVS in 10 European countries - including France, Belgium, Britain, Spain, Portugal, the Netherlands and Switzerland - the increase in mortality could have reached 80,000 amongst people over 65.
The H3N2 flu virus could be to blame - as it represents 59 per cent of the viruses - and was not included in this season's vaccine.
The mutated virus H3N2 emerged after the World Health Organisation had approved this season's vaccine composition.