More than half of the electorates contested in 1996 were newly constituted, and most of the remainder had seen significant boundary changes.

[2] In its initial area, towns with more than one polling booth were Huntly, Pukekohe, Ngāruawāhia, Tuakau, and Waiuku.

Throughout his long parliamentary career, which started in 1972, Birch always represented the electorate in which the town of Pukekohe was located, where he had established a business prior to entering parliament.

[4] When Birch retired at the 1999 election, he was succeeded by Paul Hutchison, a medical specialist.

This was necessitated by significant population growth in South Auckland and the Waikato region.

[8] In 2023, Neil Christensen, who was a candidate for the ACT Party, died during the advance voting period.

This triggered the Port Waikato by-election for the candidate vote, which will be held on 25 November 2023.

Pink background denotes a candidate elected from their party list prior to the by-election.

The electorate vote was cancelled due to the death of ACT candidate Neil Christensen.