Rotoroa Island is an island to the east of Waiheke Island in the Hauraki Gulf of New Zealand. It covers 82 hectares (200 acres). The Salvation Army purchased it for £400 in 1908 from the Ruthe family to expand their alcohol and drug rehabilitation facility at nearby Pakatoa Island. Men were treated at Home Bay at Rotoroa, while women were treated at Pakatoa.