Yên Bái province

Yên Bái
Mù Cang Chải  • Thác Bà Lake  • Tà Chì Nhù Mountain
Nickname: 
Tranquillity
Location of Yên Bái within Vietnam
Coordinates: 21°30′N 104°40′E / 21.500°N 104.667°E / 21.500; 104.667
Country Vietnam
RegionNorthwest
CapitalYên Bái
Subdivision1 city, 7 rural districts and one town
Government
 • TypeProvince
 • BodyYên Bái Provincial People's Council
 • Chairman of People's CouncilPhạm Thị Thanh Trà
 • Chairman of People's CommitteeTrần Huy Tuấn
Area
 • Total
6,892.67 km2 (2,661.27 sq mi)
Population
 (2025)
 • Total
941,872
 • Density136.648/km2 (353.918/sq mi)
Ethnic groups
 • Vietnamese42.71%
 • Tày18.28%
 • Mông13.04%
 • Dao12.33%
 • Thái7.58%
 • Others6.06%
GDP
 • ProvinceVND 27.404 trillion
US$ 1.190 billion
Time zoneUTC+7 (ICT)
Area codes216
ISO 3166 codeVN-06
HDI (2020) 0.659
(58th)
Websiteyenbai.gov.vn

Yên Bái was a former province located in Northwest Vietnam. It shared borders with six provinces which are Hà Giang province, Lào Cai province, Lai Châu province, Sơn La province, Phú Thọ province, and Tuyên Quang province. The province covered an area of about 6,893 km2 (2,661 mi2) and as of 2022 it had a population of 847,250 people.

Yên Bái's history is important under the French colony, particularly the subsequent "Yên Bái mutiny", an uprising of Vietnamese soldiers in the French colonial army on 10 February 1930 in collaboration with civilian supporters who were members of the Việt Nam Quốc Dân Đảng (VNQDD, the Vietnamese Nationalist Party).

Forestry and farming were the main economic stays of the province. Thác Bà Lake is a natural asset of the country along with its Thác Bà Hydroelectric Plant. Dong Cuong Festival is an important festival of the province.

On June 12, 2025, Yên Bái province was merged with Lào Cai province to form the current province of Lào Cai.