Niuean (Niuean: ko e vagahau Niuē) is a Polynesian language, belonging to the Malayo-Polynesian subgroup of the Austronesian languages. It is most closely related to Tongan and slightly more distantly to other Polynesian languages such as Māori, Sāmoan, and Hawaiian. Together, Tongan and Niuean form the Tongic subgroup of the Polynesian languages. Niuean also has a number of influences from Samoan and Eastern Polynesian languages.
Niuean was spoken by 1600 people on Niue Island (97.4% of the inhabitants) in 1991, as well as by speakers in the Cook Islands, New Zealand, and Tonga, for a total of around 8,000 speakers. There are thus more speakers of Niuean outside the island itself than on the island. Most inhabitants of Niue are bilingual in English.