The Siraya people are a Taiwanese indigenous people. The Siraya settled flat coastal plains in the southwest part of the island of Taiwan and corresponding sections of the east coast; the area is identified today with Tainan City and Taitung County. At least four communities make up the group: Mattauw, Soelangh, Baccloangh, and Sinckan. The first four communities correspond to the modern-day districts of Madou, Jiali, Shanhua, and Sinshih, respectively.

Taiwanese indigenous peoples, also known as Formosans, Native Taiwanese or Austronesian Taiwanese, and formerly as Taiwanese aborigines, Takasago people or Gaoshan people, are the indigenous peoples of Taiwan, with the nationally recognized subgroups numbering about 569,000 or 2.38% of the island's population. This total is increased to more than 800,000 if the indigenous peoples of the plains in Taiwan are included, pending future official recognition. When including those of mixed ancestry, such a number is possibly more than a million. Academic research suggests that their ancestors have been living on Taiwan for approximately 15,000 years. A wide body of evidence suggests that the Taiwanese indigenous peoples had maintained regular trade networks with numerous regional cultures of Southeast Asia before the Han Chinese colonists began settling on the island from the 17th century, at the behest of the Dutch colonial administration and later by successive governments towards the 20th century.