Orona atoll, also known as Hull Island, is one of the Phoenix Islands in the Republic of Kiribati. It measures approximately by , and like Kanton, is a narrow ribbon of land surrounding a sizable lagoon with depths of . Numerous passages connect the lagoon to the surrounding ocean, only a couple of which will admit even a small boat. Total land area is , and the maximum elevation is nine metres.
Kiribati declared the Phoenix Islands Protected Area in 2006, with the park being expanded in 2008. The 164,200-square-mile (425,300-square-kilometer) marine reserve contains eight coral atolls including Orano.
Although occupied at various times during the past, including as late as 2004, Orona is uninhabited today.