Exit polls for the public TVP and private TVN and Polsat television stations were conducted by the Ipsos public opinion research centre outside 500 randomly selected polling stations.
According to Ipsos, Duda received 41.8 percent of votes and Trzaskowski 30.4 percent.
Independent candidate Szymon Holownia garnered 13.3 percent, far-right leader Krzysztof Bosak secured 7.4 percent, The Left's Robert Biedron won got 2.9 percent and agrarian leader Wladyslaw Kosiniak-Kamysz got 2.6 percent.
Support for the five remaining candidates was as follows: Marek Jakubiak - 0.5 pct, Pawel Tanajno - 0.3 pct, Waldemar Witkowski - 0.3 pct, Stanislaw Zoltek - 0.3 pct and Miroslaw Piotrowski - 0.2 pct.
The second round of the elections will be held in two weeks' time, on July 12.
According to Ipsos, the election turnout amounted to 62.9 percent.
At 1830 hrs the State Electoral Commission (PKW) announced that the turnout at 1700 hrs reached 47.89 percent.
Some 29.5 million Poles who were eligible to vote could cast their ballots in 25,423 polling stations across Poland.
PKW head Sylwester Marciniak recently told PAP he expects the announcement of the official result of the Sunday vote on Wednesday, July 1, at the latest. (PAP)