First official results show Socialist candidate Francois Hollande defeated incumbent President Nicolas Sarkozy, who managed to secure only 48,1 percent of the votes.
Socialist Francois Hollande has been elected as France's new president, early estimates say.
He got about 52% of votes in Sunday's run-off, according to projections based on partial results, against 48% for centre-right incumbent Nicolas Sarkozy.
Mr Hollande would be the first French socialist president since 1995.
Analysts say the vote has wide implications for the whole eurozone. Mr Hollande has vowed to rework a deal on government debt in member countries.