The 2018 Northcote by-election was a New Zealand by-election that was held in Northcote on 9 June 2018. The seat became vacant on 15 April 2018, following the resignation of then-Member for Northcote Jonathan Coleman, a member of the New Zealand National Party.

Daniel Michael Bidois is a New Zealand politician and economist who sat as the National Party Member for Northcote in the New Zealand House of Representatives. Bidois was elected on 9 June 2018 as the Member for Northcote. He was a Strategy Manager for Foodstuffs prior to his election.