David Sassoli, former journalist won 345 votes on the second round of voting, an absolute majority of ballots cast by MEPs in Strasbourg.
The new MEPs, who took office on Tuesday during a brief inaugural session, will vote from Wednesday morning by secret ballot to elect the successor to Antonio Tajani, a conservative from Italy.
Polls in Slovakia favor the leftist Smer-Social Democracy party, the senior member of Slovakia's current coalition government, to win the most votes.
On a worldwide scale, women hold an average of 24 per cent of parliamentary seats, according to the global Inter-Parliamentary Union of national parliaments.
The stakes for the European Union are especially high in this year's elections, which are taking place over four days and involve all 28 EU nations.
All eyes will be on the ruling Conservatives and Opposition Labour Party as they are flanked by a number of Indian-origin candidates.
A ruling said that the far-right leader had wrongly used parliamentary funds to pay an aide who was based at her party's headquarters in Paris.
Facebook has faced worldwide criticism over the claims that Cambridge Analytica, the UK data analysis firm hired by Trump's 2016 campaign, harvested and misused data on 50 million members.
One Wall Street analyst said the reports raised 'systemic problems' with Facebook's business model and a number said it could spur far deeper regulatory scrutiny of the platform.
The European Union's top officials invited US President-elect Donald Trump to a summit with the 28-nation bloc after his stunning victory.