National has confirmed local list MP Parmjeet Parmar will run for the Mt Roskill seat vacated by Phil Goff.
Her candidacy for the December 3 by-election was announced by the party on its Facebook page on Wednesday.
Born in India, Dr Parmar migrated to New Zealand in 1995 and she and her husband Ravinder have two children.
She has run the family's Kiwi Empire Confectionary business and served as a Families Commissioner, on the Film and Video Labelling Body and as chair of the NZ Sikh Women's Association.
Dr Parmar stood in Mt Roskill in the 2014 general election and ran second to Labour's Mr Goff, who retained the seat with a majority of more than 8000 votes.
Mr Goff was a popular MP who had held the seat for more than 30 years, but National won more party votes than Labour - 14,725 to 12,086.
The by-election has been caused by Mr Goff's resignation following his Auckland mayoral triumph.
National and Labour are the only parliamentary parties contesting the by-election, and Labour has chosen Michael Wood as its candidate.
The Greens are standing aside to help Labour win it, and the government's ally ACT isn't putting up a candidate either.
The recently-formed People's Party has a candidate in the field, its leader Roshan Nauhria, who will be looking for ethnic minority votes.