Among them, 57.5 percent said they would definitely cast their vote on October 13, pollster SW Research said.
Meanwhile, over 10 percent of respondents declared they would “definitely” or “probably” stay home on election day.
A little over 12 percent were undecided.
Poland's previous parliamentary elections of 2015 saw a turnout of 50.92 percent.
Since 1989, the turnout in parliamentary elections in the country has rarely exceeded 50 percent.
The highest turnout, at nearly 63 percent, was recorded in the partially free elections of June 4, 1989, which ended communist rule in Poland.