The prime minister was leaving the Mangere Arts Centre when a man started shouting obscenities at him.
The man was taken aside by two police officers, with whom he continued an aggressive conversation long after Hipkins had left.
Before the outburst - and before he cast his vote - Hipkins optimistically told reporters "the late surge is on".
It comes as The New Zealand Herald’s final Poll of Polls shows the left bloc has no realistic path to power, and National and Act are likely going to need NZ First to form a Government.
There is a 99.8 percent chance of National, Act, and NZ First being able to form a government after the election.
Take NZ First away and National and Act have just a 28.5 percent chance of getting over the line.
The Poll of Polls still suggests there is a 0 percent chance of Labour, the Greens, and Te Pāti Māori getting over the line, with the slight surge in the left bloc’s support failing to register.
By Chris Knox and Thomas Coughlan
