Port Waikato was a New Zealand parliamentary electorate that existed for four parliamentary terms from 1996 to 2008. It was held by Bill Birch for one term, and the remaining three terms by Paul Hutchison; both were members of the National Party.
The 1996 election was notable for the significant change of electorate boundaries, based on the provisions of the Electoral Act 1993. Because of the introduction of the mixed-member proportional (MMP) electoral system, the number of electorates had to be reduced, leading to significant changes. More than half of the electorates contested in 1996 were newly constituted, and most of the remainder had seen significant boundary changes. In total, 73 electorates were abolished, 29 electorates were newly created (including Port Waikato), and 10 electorates were recreated, giving a net loss of 34 electorates.
The Port Waikato electorate was formed from parts of the Franklin, Raglan, and Waikato electorates, all of which were abolished. In its initial area, towns with more than one polling booth were Huntly, Pukekohe, Ngaruawahia, Tuakau, and Waiuku. Localities with a single polling booth were Aka Aka, Awhitu, Bombay, Buckland, Glen Massey, Glen Murray, Glenbrook, Horotiu, Mauku, Meremere, Naike, Ohinewai, Onewhero, Orini, Otaua, Paerata, Pokeno, Port Waikato, Pukekawa, Pukemiro, Pukeoware, Puni, Raglan, Rangiriri, Ruawaro, Taupiri, Te Akau, Te Hoe, Te Kauwhata, Te Kohanga, Te Kowhai, Te Pahu, Te Uku, Waerenga, Waikaretu, Waikokowai, Waingaro, Waipipi, Waiterimu, Waitetuna, Whatawhata, and Whitikahu.