Tatuanui is a settlement and rural community in the Matamata-Piako District and Waikato region of New Zealand's North Island. It is located north-east of Morrinsville, south-west of Te Aroha, Waihou and Waitoa, and north of Ngarua, at the intersection of State Highway 26 and State Highway 27. The intersection was converted to a roundabout between June and December 2011 for safety reasons.