The Austronesian peoples, sometimes referred to as Austronesian-speaking peoples, are a large group of peoples in Taiwan, Maritime Southeast Asia, Micronesia, coastal New Guinea, Island Melanesia, Polynesia, and Madagascar that speak Austronesian languages. They also include indigenous ethnic minorities in Vietnam, Cambodia, Myanmar, Thailand, Hainan, the Comoros, and the Torres Strait Islands. The nations and territories predominantly populated by Austronesian-speaking peoples are sometimes known collectively as Austronesia.

They originated from a prehistoric seaborne migration, known as the Austronesian expansion from pre-Han Taiwan, at around 1500 to 1000 BCE. Austronesians reached the northernmost Philippines, specifically the Batanes Islands, by around 2200 BCE. Austronesians used sails some time before 2000 BCE.^: 144 In conjunction with their use of other maritime technologies (notably catamarans, outrigger boats, lashed-lug boat building, and the crab claw sail), this enabled their dispersal into the islands of the Indo-Pacific, culminating in the settlement of New Zealand c. 1250 CE. From 2000 BCE they assimilated (or were assimilated by) the earlier Paleolithic pre-Austronesian, and Australo-Melanesian Papuan populations. They reached as far as Easter Island to the east, Madagascar to the west, and New Zealand to the south. At the furthest extent, they might have also reached the Americas.

Aside from language, Austronesian peoples widely share cultural characteristics, including such traditions and technologies as tattooing, stilt houses, jade carving, wetland agriculture, and various rock art motifs. They also share domesticated plants and animals that were carried along with the migrations, including rice, bananas, coconuts, breadfruit, Dioscorea yams, taro, paper mulberry, chickens, pigs, and dogs.