Masterton () is a large town and local government district in the Wellington Region of New Zealand. It is the largest town in the Wairarapa, a region separated from Wellington by the Rimutaka ranges. It is 100 kilometres north-east of Wellington, 28 kilometres south of Eketahuna, on the Ruamahanga River.

Masterton () is a large town and local government district in the Wellington Region of New Zealand. It is the largest town in the Wairarapa, a region separated from Wellington by the Rimutaka ranges. It is 100 kilometres north-east of Wellington, 28 kilometres south of Eketahuna, on the Ruamahanga River.