Manawatū-Whanganui is a region in the lower half of the North Island of New Zealand, whose main population centres are the cities of Palmerston North and Whanganui. It is administered by the Manawatū-Whanganui Regional Council, which operates under the name Horizons Regional Council. The region covers over 22,000 square kilometres, making it …Manawatū-Whanganui is a region in the lower half of the North Island of New Zealand, whose main population centres are the cities of Palmerston North and Whanganui. It is administered by the Manawatū-Whanganui Regional Council, which operates under the name Horizons Regional Council. The region covers over 22,000 square kilometres, making it the sixth largest region by area in the country and is home to 261,100 residents.