Kaipara ki Mahurangi is an electorate to the New Zealand House of Representatives. It was created for the .
The electorate consists of a large northern section of the Auckland Region. It stretches from the border with Northland to the northwestern end of WaitematÃÂ Harbour, and consists mostly of various satellite towns north of Auckland. Population centres within the electorate include:
The electorate was created after rapid population growth in the former electorate caused the northern section to be carved off and incorporated into , which in turn lost the Waitakere Ranges to and an area around Coatesville and Dairy Flat to (the former Rodney). Initially, it was proposed to keep the name Helensville, but after opposition from residents in the Kowhai Coast area, that name was scrapped and it was named Kaipara ki Mahurangi instead.
In the 2025 boundary review, continued population growth in northern Auckland led to the transfer of Westgate and Whenuapai to . An area west of Massey was shifted into the reinstated electorate, and a small area south of Coatesville was taken from and added to Kaipara ki Mahurangi,
The electorate draws its name from two areas of geographic importance, the Kaipara Harbour, in the west of the electorate, and the Mahurangi River, which is located on the eastern end of the constituency. Translated, the name essentially means Kaipara to Mahurangi, or Kaipara-Mahurangi.
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Members of Parliament elected from party lists in elections where that person also unsuccessfully contested the Kaipara ki Mahurangi electorate. Unless otherwise stated, all MPs' terms began and ended at general elections.
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