National got 54.4 percent support over Labour's 33.7 percent in the poll -- translated into an election result that would mean it could govern alone.
Prime Minister John Key scored 67.7 percent as the preferred prime minister in the poll in today's New Zealand Herald.
Labour leader Phil Goff got 11.9 percent. New Mana Party leader Hone Harawira won 1.6 percent support, while Act's new leader, Don Brash, scored 1.2 percent.
Voters were also asked about Mr Goff's performance as Labour leader, 22.2 percent rated him highly while 40.4 percent thought he was average and 33 percent gave him a negative rating.
Asked about changes to the KiwiSaver scheme 48.3 percent opposed them and 40 percent approved.
Almost 60 percent of people felt their financial situation had improved (up 9.2 percent) or was much the same (50.1 percent).
The polls showed Act's support rose after Dr Brash ousted Rodney Hide as party leader last month -- from 0.9 per cent five months ago to 1.7 per cent now -- but that would only return two MPs to Parliament.
The poll of 750 eligible voters was conducted between May 19 and May 25 and had a margin of error of plus or minus 3.6 percent.
