Fuvahmulah (Dhivehi: ފުވައްމުލައް) is a large single island (by itself a small detached atoll) in the Maldives. It is one of the administrative divisions of the Maldives under the name Gnaviyani Atoll or Nyaviyani Atoll. The inhabitants speak a distinctive form of the Dhivehi language, known as Mulaku bas.

The name of this island means "Island of the Areca nut palms", Fuvah (or "Fua") in the local language. Other places in the world like Penang in Malaysia and Guwahati in Assam, India, are also named after this nut. The original name of the island could have simply been Mulah, but was called Fuvahmulah (the Mulah with the arecanut palms) to distinguish it from Boli Mulah - another important island in ancient Maldives.

The admiralty charts and some geographers used the name of the island as Fua Mulaku. In old French maps the island appeared with the name Poue Molluque.

The island is about 4.5 km by 1.2 km with a submerged reef (Rashikedefaro) extending for about three km in a SE direction. In the distant past Fuvahmulah was a small coral atoll whose southern end was open at a spot called Diyarehifaando and the inside of the island was a saltwater lagoon forming a natural harbour. There is a spot on the southern end known as a Kudhuheraival (the forest of the small islet), which indicates that there was a separate little island in that area in ancient times.