The Labour Party has retained three of its traditionally safe South Auckland seats of Mangere, Manukau East and Manurewa, but lost Maungakiekie to National's new Samoan candidate.
Maungakiekie switched between Labour and National during election night, and was won in the end by National's Peseta Sam Lotu-iiga, 1,876 votes ahead of Labour's candidate, Council of Trade Unions secretary Carol Beaumont.
Su'a WIlliam Sio took Mangere for Labour, with 11,263 votes and a majority of nearly 6,500 over Taito Phillip Field, who was the MP with the biggest majority in the 2005 election.
Mr Field was formerly a Labour and then an Independent MP.
Mr Sio says his team worked hard to retain the seat, given the tough competition from Mr Field's newly-formed New Zealand Pacific Party.
Manurewa MP George Hawkins also held his seat for Labour with 11,833 votes, as did Ross Robertson in Manukau East with 15,122 votes.
In closely fought Auckland Central, National's Nikki Kaye took the seat from long standing Labour MP Judith Tizard. Ms Kaye had a majority of more than 1,100.
Ms Tizard is now unlikely to make it back into Parliament as she is too far down on the Labour Party list.
In other final results in Auckland seats, National's Wayne Mapp held North Shore, with more than 13,000 votes, along with Murray McCully in East Coast Bays with a similar margin.
National's Paula Bennett won Waitakere, ending 901 votes ahead of Labour's Lynne Pillay.
National's Pansy Wong took the new seat of Botany by 10,119 votes ahead of Labour's Koro Tawa.
For Labour, Phil Goff held to Mt Roskill and Chris Carter held Te Atatu.
National's Jonathan Coleman in Northcote and Maurice Williamson in Pakuranga retained their seats.
In Epsom, ACT leader Rodney Hide kept his seat by more than 11,000 votes.