What is the longest river in New Zealand?

The longest river in New Zealand is the Waikato River. It runs for about 425 kilometres through New Zealand’s North Island, from the Lake Taupō region to Port Waikato on the Tasman Sea.

The river’s headwaters are linked to the slopes of Mount Ruapehu and the Tongariro River system. After passing through Lake Taupō, it leaves the lake near Taupō, forms the famous Huka Falls, and continues north-west across the Waikato Plains. Hamilton is the largest city situated along its course.

The Waikato is important for hydroelectric power, agriculture, industry, recreation, and Māori history. Its name comes from Māori words often interpreted as referring to flowing water. Waikato-Tainui has a special cultural relationship with the river, reflected in modern co-management arrangements.

A common mix-up is the Clutha River, also called Mata-Au, which is New Zealand’s longest river on the South Island. At roughly 322 kilometres, it is substantial but shorter than the Waikato.