Titoki is a locality in the Mangakahia Valley of Northland, New Zealand. Whangarei is 26 km (16 miles) to the east. The Wairua River passes to the east of Titoki, and the Mangakahia River, to the west. A hydroelectric plant has been operating at Wairua Falls since 1916. It was upgraded to produce 5.4 Gwh per year in 2007.