Dhidhdhoo (Dhivehi: ދިއްދޫ) is the capital of Haa Alif Atoll in the Maldives. It is an island-level administrative constituency governed by the Dhidhdhoo Island Council. The island lies on the north western tip of Thiladhunmathi Atoll and is separated from the Ihavandhippolhu Atoll by the deep Gallandhoo Kandu channel.