Johnsonville is a large suburb in northern Wellington, New Zealand. It is seven kilometres north of the city centre, at the top of the Ngauranga Gorge, on the main route to Porirua. It is commonly known by locals as "J'ville".

The Ngauranga Gorge is in the Wellington Region of New Zealand. State Highway 1 runs through the gorge, a vital link between central Wellington City and its northern suburbs and Porirua City and the Kāpiti Coast; it is the main route north out of Wellington. It is 2 kilometres (1.2 mi) long and has a grade of approximately 8 percent. Sixty-five thousand vehicles a day travel through it, and it connects the Wellington Urban Motorway with the Johnsonville–Porirua Motorway.