The Ta Oi is among 21 Mon-Khmer language ethnic groups with a population of more than 43,800 residing mainly in A Luoi district of Thua Thien Hue province and Huong Hoa and Da Krong districts of Quang Tri province in Central Vietnam.

Thua Thien Hue is renowned for beautiful pristine beaches and five UNESCO-recognized heritages. They are the Complex of Hue Monuments - a complex of palaces, ancient tombs, temples and shrines - recognized as a world heritage site in 1993; nha nhac (Hue royal court music), recognized as an oral and intangible heritage in 2003; moc ban (wood blocks) and chau ban (royal records) of the Nguyen dynasty, recognized as the world documentary heritage in the Memory of the World Program; the imperial archives of the Nguyen dynasty, recognized as a UNESCO Memory of the World Program in 2017.

The Ta Oi, a Mon-Khmer language ethnic group with a population of nearly 35,000 living mainly in the mountainous areas of the central provinces of Thua Thien-Hue and Quang Tri, has adopted many customary laws related to forests.

The ethnic minority group of Ta Oi, called "Ta Uot" in some areas, has a population of over 26,000 (according to the 1989 census figure), residing largely in Quang Tri province and western part of Thua Thien-Hue province.

The Ta-oi, a Mon-Khmer language ethnic group, lives in mountainous areas of the central provinces of Thua Thien-Hue and Quang Tri with a population of nearly 35,000.