Simon Bridges has told his supporters he was excited about his role as Tauranga MP and believed National had a good chance to lead the country again.
Mr Bridges delivered a speech to those attending his election party, thanking supporters and family.
Although official results were not confirmed, he was confident.
"We've got a good chance of forming a government for another three years," Mr Bridges said.
Bridges arrived at No 1 The Strand about 7.20pm, receiving hugs from supporters. Hesaid his supporters were the reason he had been successful in this campaign.
"They know that we party vote National," she said. "They do have a good sense of it."
Even though Mrs Bridges was pregnant this election campaign, she got out as much as possible to be part of it.
She did not know if it was because she was carrying a girl, but said this pregnancy had felt easier than with her boys so campaigning was not difficult.
"I try to get involved in as much campaigning as possible.
"I enjoy getting out there."
She said the support for her husband and the National Party was "amazing".
"There's been so many of them and they've been amazing. I really feel that everyone has pulled together to try and brings good result in. It's really amazing."
Lynda Marwood and Tony Young are looking forward to tonight's election results.
"I think it's going to be really really interesting," Mr Young said.
"It's exciting, you just don't know what's going to happen," Ms Marwood said.
"I just hope New Zealand's picked right," she said.
National Party supporters are keeping up to date with live election coverage via television, laptops and personal devices.
Fellow National Party member Moses Anderson said he pledged his allegiance to the party after studying politics and realising it had similar values as he did.
"I just decoded that I'd start finding the party I belonged to," Mr Anderson said.
"Everything that National stood for ... I did," he said.
11.35pm: Final results are in for Tauranga and Rotorua, and Waiariki and Bay of Plenty are almost there.
National MPs Simon Bridges (Tauranga), Todd Muller (Bay of Plenty) and Todd McClay (Rotorua) have retained their seats, while Waiariki has changed hands from Te Ururoa Flavell (Maori) to Tamati Coffey (Labour).
In Tauranga, Bridges got 19,111 votes, followed by Jan Tinetti (Labour) on 8841 votes and Clayton Mitchell (NZ First) on 4406 votes.