"Whanganui have gone from strength to strength really, they often produce some of New Zealand's best debaters. We've seen several individuals from High School represent New Zealand overseas," he said.
Whanganui High debating coach Susan Hughes said she was "extremely proud of how they did".
Overall 12 students from Whanganui took part in the competition - nine from High School and three from Wanganui Collegiate.
Four High School students and two from Palmerston North High have been chosen to represent the region in the national finals.
"Central North Island has a proud record at the nation competition, having made it to the knockout stage despite not having as many weekly rounds as the others. It's certainly a team that punches above its weight," said Mr Baxter.
The national finalists are eligible to be one of a five-person team selected to travel to Germany to represent New Zealand in the world championship.