Huvadhu, Suvadive, Suvaidu or Suvadiva is the atoll with the most islands in the world. The atoll is located in the Indian Ocean. It is south of the Suvadiva Channel in the Republic of Maldives with a total area of 3,152 km2, of which 38.5 km2 is dry land. The atoll contains 255 islands.

Thinadhoo City is the capital of Gaafu Dhaalu region in the atoll of Huvadhu and the proposed capital for the Upper South Province of the Maldives. It has its own dialect of Dhivehi which is considerably different from northern speech.