The 2025 New Zealand Motocross Championship season, known for sponsorship reasons as the Yamaha New Zealand Motocross Championship, was the 51st New Zealand Motocross Championship season.
The series consisted of four rounds across the country, running from mid February to mid March. 
Hamish Harwood was the reigning champion in the MX1 class, after picking up his sixth national title in the 2024 season. Ultimately, it was Maximus Purvis who took the title in the MX1 class, his fourth national title overall.
In the MX2 class, James Scott was the reigning champion, after picking up his first senior national title in the previous season. Madoc Dixon won two of the four rounds in the MX2 class to take his first senior national title.
The second and final rounds of the series were held at the Rotorua track, after the original venue for the final round pulled out of running it prior to the start of the season.
MX1.
Riders Championship.
Points are awarded to finishers of the main races, in the following format:
MX2.
Riders Championship.
Points are awarded to finishers of the main races, in the following format: