With just under three weeks until the election, Newshub's new political poll shows the gap is closing between Labour and National, but Labour could still govern alone.

The Newshub Reid Research Poll had Labour at 50.1 percent - down 10 percent on the last poll - but well above National at 29.6 percent.

ACT is on 6.3 percent and the Greens are at 6.5 percent. NZ First is at 1.9 percent.

On those figures, Labour would have 65 seats in Parliament, National 38, and the Greens and ACT eight each.

As for the minor parties, the New Conservatives are polling at 2.1 percent, the Maori party at 1.5 percent and The Opportunities Party at .9 percent.

In the preferred prime minister stakes, Jacinda Ardern is on 53.2 percent and Judith Collins is on 17.7 percent.

Last week's TVNZ Colmar Brunton poll had Labour at 48 percent, National on 31 percent, ACT on 7 percent, Greens on 6 percent and NZ First on 2 percent.

Newshub's last poll in late July had on 60.9 percent and National at 25.1 percent.

The election date is 17 October.