There's no official definition of "Wellington Metro area", so it's hard to say. Greater Wellington Regional Council might be the closest thing, and while that excludes Kapiti it include much of the Wairarapa. If I had to come up with my own "metro area", I'd include Kapiti up to Waikanae but not the Wairarapa, since the former has a lot of satellite or commuter towns (plus retirees, of course), while the latter, apart from a few Wellington commuters in Featherston etc, is primarily rural.Just to clarify something I am a little confused about. Wellington's metro population is around 450,000. On another post it says Kapiti is not part of this metro area.