Marquesan is a collection of East-Central Polynesian dialects, of the Marquesic group, spoken in the Marquesas Islands of French Polynesia. They are usually classified into two groups, North Marquesan and South Marquesan, roughly along geographic lines.
The North Marquesan dialects are spoken on the islands of Ua Pu and Nuku Hiva, and South Marquesan dialects on the islands of Hiva ʻOa, Tahuata and Fatu Hiva. The dialects of Ua Huka are often incorrectly classified as North Marquesan; they are instead transitional. While the island is in the northern Marquesas group, the dialects show more morphological and phonological affinities with South Marquesan. The North Marquesan dialects are sometimes considered two separate languages: North Marquesan and Tai Pi Marquesan, the latter being spoken in the valleys of the eastern third of the island of Nuku Hiva, in the ancient province of Tai Pi.