Ruatuna is a house built from kauri timber in 1877 at Hukatere in the Matakohe district, New Zealand, overlooking the Kaipara Harbour. The house is the birthplace of Gordon Coates (1878–1943), who served as Prime Minister of New Zealand from 1925 to 1928. Ruatuna was registered by the New Zealand Historic Places Trust on 23 June 1983 and has registration number 7. The building has a category I listing.