Foreign Minister Sigmar Gabriel also welcomed the vote's outcome, tweeting that it paved "the way for reforms in France+Europe". Macron's party, which didn't exist 14 months ago and offered novice candidates from civilian life, has drawn from left and right to fill its ranks, effectively blurring the traditional left-right political divide. He said the Socialist party needed to change its ideas and its organization and that a "collective leadership" would replace him.
Macron's rivals have urged voters not to stay at home, warning power could be too concentrated in the hands of one party and democratic debate stifled.
Macron left a position in the Socialist government to run an independent presidential campaign.
Le Pen's FN were only expected to win four to eight seats but she was elected an MP.
On Sunday she was swift to say the record-high abstention rate in the parliamentary election weakened Macron's legitimacy.
"We shall fight with all our strength the harmful projects of the government, which is only in place to implement the road map sent by Brussels". The overall results will be a huge disappointment for the nationalist and anti-EU party which had once hoped to emerge as the main opposition in parliament to Macron's centrist party.
Les Republicains' interim leader Francois Baroin said "the verdict of the ballots is clear" before wishing Macron success.
French President Emmanuel Macron's party has won a majority in parliamentary polls, exit polls show, weeks after his presidential victory.
PARIS French far-right leader Marine Le Pen was on Sunday elected to parliament together with seven other National Front candidates, a result that beat worse-case scenarios for the party but will not be enough to paper over deep divisions. The far-right National Front are also expected to have minor presence despite their strong showing in the presidential contest.
Oil prices struggle on doubts OPEC can rein in oversupply
Libyan output will reach 900,000 barrels a day within days, National Oil Co. said on its website, citing Chairman Mustafa Sanalla. West Texas Intermediate crude July contract was at $44.48 a barrel by 3:55AM ET (0755GMT), down 25 cents, or around 0.6%.
Macron will need to keep the diverse and politically raw group of lawmakers united behind him as he sets out to overhaul the labour code, cut tens of thousands of public-sector jobs and overhaul an unwieldy pension system.
To win a seat outright in the first round of voting, candidates had to win more than half of the votes, which must account for at least a quarter of the registered voters.
Macron wants to use his mandate to strip away some labor protections to encourage hiring and to toughen security. Sunday's vote was overshadowed by low voter turnout and widespread disillusionment with politics.
Macron cast his vote early in the morning in the seaside resort of Le Touquet before flying to a ceremony outside Paris to mark the anniversary of Charles de Gaulle's 1940 appeal for French resistance to Nazi occupation.
But turnout was estimated to be extremely low, at around 44 percent, giving his critics grounds to claim he has no groundswell of support.
The second round of the parliamentary election was marked by low voter turnout and was down sharply on five years ago.
"From this evening, it is time for the presidential majority to get to work", the prime minister said.
Melenchon's resurgent France Unbowed and the Communist Party were on course to win 26 to 30 seats.
The far-right National Front (FN) improved its performance after snatching 6 seats compared to two now, while the outgoing ruling the Socialist Party, lost its lead with only 32 seats.
The conservative Republicans are expected to form the bulk of the opposition but the Socialists face a humiliating defeat.