Given his pro-EU rhetoric, his success could translate into success for the rest of the European Union and perhaps more specifically the Eurozone.
With almost all votes counted, Macron's party, alongside its MoDem allies, won more than 300 seats in the 577-seat National Assembly. With the June 27 start of the new session, the novices within the ranks of Macron's Republic on the Move! party will be learning at high-speed. Seats for the Socialist party - the party of former president Francois Hollande - meanwhile collapsed from 280 to just 29, their lowest ever.
Jean-Claude Cambadélis, the socialist leader, has since announced his retirement, and said the left must "to change everything, its form and its substance, its ideas and its organisation".
With almost all votes counted, his La République en Marche, alongside its MoDem allies, won more than 300 seats in the 577-seat National Assembly.
The conservative Republicans and their allies are the main opposition group in parliament, winning 136 seats.
Despite a strong platform for Macron, a low voter turnout underlines that he may yet have to tread carefully with French reforms.
The traditional right and left parties that had dominated parliament and government for decades saw their presence in the assembly shrink significantly, confirming the redrawing of the French political landscape that began when the Socialists and the rightwing Republicans were knocked out in the first round of spring's presidential election. The far-right leader was elected in the northern town of Henin- Beaumont but her joy at finally making it to parliament will be tempered by the poor performance of her party.
Macron wants to move quickly on relaxing labor regulations before overhauling France's unwieldy pension system next year.
Macron's confident start at home, where he has concentrated on trying to restore the lost prestige of the president, and his bold action on the global stage has inspired a host of positive headlines.
The party was founded in April previous year, and now has one of the biggest majorities in recent French history - the kind Mrs May was unable to win in this month's general election. Her party leadership has been ideologically divided, and one key player-her niece Marion Maréchal-Le Pen, who had been one of the party's two members of parliament until now-has left the movement completely.
Correspondents say opponents of Mr Macron may simply have not bothered to turn out.
Melenchon won a seat in the southern city of Marseille on a pledge to lead resistance to Macron's radical labour market reforms.
Philippot, who has said he will quit if the party drops its anti-euro policy, told BFM TV that the party had to avoid "hysteria".
France's youngest leader since Napoleon and having never before held elected office, Macron has seized on the growing resentment towards a political elite perceived as out of touch, and on public frustration at its failure to create jobs and spur stronger growth.