According to the national election committee, with 99.22 percent of votes counted, the party had nearly 68 percent of the popular vote and 263 of the 386 seats in parliament, followed by the ruling Socialists with 15 percent (59 seats), the far-right Jobbik with 12 percent (47 seats) and a new Green party called Politics Can be Different with 4.1 percent (16 seats).

One seat went to an independent.

Almost a third of the seats were left to be decided on April 25 following the first round two weeks ago.

Fidesz leader Viktor Orban is set to become prime minister. Mr Orban welcomed the result, saying he would rule "with humility".

The entire leadership of the Socialist party, who had governed for the past eight years, tendered its resignation after the results were revealed.

The second round of the election was fought in 57 constituencies where no single candidate had won more than 50 percent of the vote in the first round.