Name of ethnic group: Xtieng (Xa Dieng). Population: 66,788 people (Year 1999). Locality: The Xtieng live in four northern districts of Binh Phuoc Province and in Dong Nai and Tay Ninh provinces.  

Name of ethnic group: Xo Dang (Xe Dang, Ca Dong, To Dra, Ha Lang, Mo Nam, Ta Tri, Ka Rang, Bri La Teng, and Con Lan). Population: 127,148 people (Year 1999). Locality: The Xo Dang are concentrated in Kon Tum Province and scattered in the mountainous areas of Quang Ngai and Quang Nam provinces.  

Name of ethnic group: Xinh Mun (Puoc, and Pua). Population: 18,018 people (Year 1999). Locality: Son La and Lai Chau provinces and along the Vietnamese-Lao border regions.  

Name of ethnic group: Tho (Keo, Mon, Cuoi, Ho, Tay Poong, Dan Lai, and Ly Ha). Population: 68,394 people (Year 1999). Locality: The Tho live in the western parts of Nghe An Province.  

Name of ethnic group: Thai (Tay, Tay Dam, Tay Khao, Tay Muoi, Tay Thanh, Hang Tong, and Pu Thay). Population: 1,328,725 people (Year 1999). Locality: Lai Chau, Dien Bien, Son La, Hoa Binh, and Nghe An provinces.

Name of ethnic group: Ta Oi (Toi Oi, Pa Co, Ba Hy, and Ba Ghy). Population: 34,960 people (Year 1999). Locality: A Luoi District of Thua Thien-Hue Province and Huong Hoa District of Quang Tri Province.  

Name of ethnic group: Tay (Tho, Ngan, Phen, Thu Lao, and Pa Di). Population: 1,477,514 people (Year 1999). Locality: The Tay lives along the valleys and the lower slopes of the mountains in Cao Bang, Lang Son, Bac Kan, and Quang Ninh provinces, and in some regions of Bac Giang and Bac Ninh provinces.  

Name of ethnic group: Si La (Cu De Xu, Kha Pe). Population: 840 people (Year 1999). Locality: Lai Chau Province.  

Name of ethnic group: San Chay (Cao Lan, San Chi, Man Cao Lan, and Hon Ban). Population: 147,315 people (Year 1999). Locality: Concentrated in Tuyen Quang, Thai Nguyen, and Bac Giang provinces. Communities of San Chay are also found scattered in Quang Ninh, Yen Bai, Lang Son, and Vinh Phuc provinces.  

Name of ethnic group: Ro Mam. Population: 301 people (Year 1999). Locality: The Ro Mam live in Le Village, Mo Rai Commune, Sa Thay District of Kon Tum Province.