The Atayal (), also known as the Tayal and the Tayan, are a Taiwanese indigenous people. The Atayal people number around 90,000, approximately 15.9% of Taiwan's total indigenous population, making them the third-largest indigenous group. The preferred endonym is "Tayal", although the Taiwanese government officially recognizes them as "Atayal".
The Atayal word for Atayal is tayal, meaning "human" or "man".
The first record of Atayal inhabitance is found near the upper reaches of the Zhuoshui River. During the late 17th century, they crossed the Central Mountain Ranges into the wilderness of the east. They then settled in the Liwu River valley. Seventy-nine Atayal villages can be found here.
Taiwan has been home to a number of Austronesian indigenous groups since before 4,000 BC. However, genetic analysis suggests that the different peoples may have different ancestral source populations originating in mainland Asia, and developed in isolation from each other. The Atayal people are believed to have migrated to Taiwan from Southern China or Southeast Asia. Genetic studies have also found similarities between the Atayal and other people in the Philippines and Thailand, and to a lesser extent with south China and Vietnam. The Atayal are genetically distinct from the Amis people who are the largest indigenous group in Taiwan, as well as from the Han people, suggesting little mingling between these people. Studies on Mitochondrial DNA (mtDNA) polymorphisms suggest ancient migrations of two lineages of the various peoples into Taiwan approximately 11,000-26,000 years ago.
Recent DNA studies show that the Lapita people and modern Polynesians have a common ancestry with the Atayal and the Kankanaey people of the northern Philippines.
The Atayal are visibly different from the Han Chinese of Taiwan. Intermarriage with Chinese also produced a significant number of Atayal-Chinese mixed offspring and celebrities such as Vivian Hsu, Vic Zhou, Yuming Lai, Kao Chin Su-mei.