Hai Bà Trưng District (Two Trưng Sisters District) is the most populous (est. 378,000) urban district (quận) of Hanoi, the capital city of Vietnam.
Established as one of the first four central districts of the city, it is named after the two heroines in Vietnamese history: the two Trưng Sisters. Some of Vietnam's largest universities are located here, including the Hanoi University of Technology, Hanoi National Economic University, Hanoi University of Civil Engineering, and the Hanoi University of Pharmacy.
Coordinates: 21°00′42″N 105°50′52″E / 21.01167°N 105.84778°E / 21.01167; 105.84778