Victoria is now the "number one state" for membership of Pauline Hanson’s One Nation, with polling figures suggesting the party's growing support is putting it in a position to win up to three seats in November's election.

One Nation says it has seen a surge in recruitment in Victoria over the past six months, with the party now choosing candidates for the first state election it will have contested here since 1999.

One Nation senator Pauline Hanson and the party's general secretary, James Ashby. Credit:Alex Ellinghausen

Internal Labor polling taken at the beginning of May in the state seat of Sunbury shows the anti-immigration outfit sitting on 11 per cent of the primary vote, just behind the Greens.

The latest published state-wide polling puts One Nation support between 5 and 6 per cent across Victoria but the ALP survey, of more than 770 voters in the northern suburbs and semi-rural seat, suggests there are pockets of stronger support around Victoria for Senator Hanson's party.