Wanganui Collegiate School has gained integration into the state network of schools.
Education Minister Hekia Parata anounced the decision today.
"This has been a difficult and drawn out process,'' Ms Parata said.
"Wanganui Collegiate has been working towards integration for the last two years and the Wanganui Collegiate community will be pleased to see a successful outcome.''
Ms Parata said that as one of New Zealand's oldest schools, Wanganui Collegiate held an iconic place in the history of education in New Zealand. Integrating the school would ensure it not only continued to be a vibrant part of the Wanganui community, but also that a Collegiate education was available to a wider number of students.