Poland's incumbent President Andrzej Duda has narrowly beaten challenger Rafal Trzaskowski in Sunday's presidential vote.
The National Electoral Commission said Mr Duda had won 51.2% of the votes.
Turnout was reportedly 68.2%, the highest in Poland's post-Communist history.
The vote has been widely seen as a battle for the country's future as well as its strained relations with the European Union.
Mr Duda is a social conservative allied with the government led by the nationalist Law and Justice (PiS) party, while Mr Trzaskowski is the socially liberal mayor of Warsaw.
Mr Duda's win is expected to lead to further controversial reforms to the judiciary and continued opposition to abortion and gay rights.
The opposition Civic Platform (PO) group - which backed Mr Trzaskowski - told Reuters news agency it was collecting information on voting "irregularities" after the polls closed on Sunday, including reports of Poles abroad not receiving their voting packages in time to take part in the election.