Manukau City is a city in the Auckland region of New Zealand. It is the third most populous city in New Zealand. The area is commonly referred to as South Auckland, but this term does not possess any official recognition and does not encompass East Auckland, which is within the official boundaries of Manukau City. Manukau includes the theme park Rainbow's End, and one of the oldest shopping malls in the country, now called Westfield Manukau City.