The proposed new ward boundaries will be open for public submission.
Mangawhai will be represented by an extra elected councillor if a proposed Kaipara District ward shakeup wins approval after public consultation.
The proposal comes after Kaipara District Council and electoral officer Dale Ofsoske settled on a preferred option following a representation review.
The option would see the district formed into three general wards instead of four, as well as a Maori ward.
The central Otamatea ward would remain with two councillors, while the eastern Kaiwaka-Mangawhai ward would increase its representation from two to three councillors.
The Dargaville and West Coast wards would merge into a single west ward with three councillors – effectively losing one. It is proposed the new merged ward will be named Wairoa.
The new Maori ward would be represented by a single councillor and is proposed to be called Te Moananui o Kaipara, meaning “the vast oceans of the Kaipara”.
Mr Ofsoske said that forming the wards in this way would meet legal requirements to balance the number of councillors with the population of each ward.
Currently, Kaiwaka-Mangawhai is under-represented by 38 per cent.
Council plans to pass a resolution on the proposal on August 25. The public will be able to submit on the proposal from August 27 to September 27.
If approved, the new wards will be contested in the October elections next year.