Green Hill (also known as Mātanginui or Greenmount) is one of the volcanoes in the Auckland volcanic field, located in the suburb of East Tāmaki.

It erupted approximately 20,000 years ago,[1] and its scoria cone had a peak 78 metres above sea level (around 48 m higher than the surrounding land) and had a grove of karaka trees.

Green Hill, known as Mātanginui, was a traditional settlement for Ngāi Tai ki Tāmaki,[2] the name either being translated as "The Pā Taken with Much Crying" or "Big Breeze".

[5][6] By the 16th century, the surrounding area became extensive stonefield gardens due to its productive volcanic soil,[7][8] and a defensive pā was constructed at the peak of the hill.

The name recalls Mrs Styak's home at Randalstown in Northern Ireland, which was called Green Bank.