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 thriving community with an urban population of , and district population of The Wairarapa Line railway allows many residents easy access to work in the cities of Wellington, Lower Hutt and Upper Hutt.Local industries involve service industries for the surrounding farming community. Industrial development is growing in Masterton, with three new industrial parks being developed in Waingawa, Solway and Upper Plain. The town is the headquarters of the annual Golden Shears sheep-shearing competition.