Omanaia is a settlement in the Hokianga area of Northland, New Zealand.In the 1830s, the Omanaia Maori chief Papahurihia led a nationalist movement to oppose the spread of Christianity through the Hokianga.EducationOmanaia School is a coeducational full primary (years 1-8) school with a decile rating of 3 and a roll of 37 in 2009.