The 1985 New Zealand Grand Prix was a race held at the Pukekohe Park Raceway on 16 December 1984. It was the 31st running of the New Zealand Grand Prix and was run to Formula Pacific regulations. The race was won by American Ross Cheever, who would return to win the next event a month later. The podium was completed by New Zealander Ken Smith and fellow American Jeff MacPherson.
Despite being labelled the 1985 iteration of the event, it was actually held in December 1984. This marked the only time that two New Zealand Grands Prix were held in the same calendar year.