Long Biên District is an urban district (quận) of Hanoi, the capital of Vietnam. Long Biên was incorporated as an urban district in 2003 from the northwestern portion of Gia Lâm district adjacent to the city center. The district is named for the formerly separate settlement of Long Biên (Chinese: Longbian), which served as the capital of Jiaozhou and Jiaozhi in imperial China and as the capital of Ly Bi's kingdom of Van Xuan. It is Hanoi's only urban district on the east side of the Red River. The district includes Long Biên Bridge, the headquarters of Vietnam Airlines, the Civil Aviation Authority of Vietnam (CAAV), and VinGroup.
Gia Lâm Airport, Gia Lâm Railway Station and Gia Lâm Bus Station are located in the district and were named after Gia Lâm District that formerly covered Long Biên. Several venues that have the named "Long Biên" such as Long Biên Railway Station, Long Biên Bus Terminal and Long Biên Market, however, are located on the western end of the Long Biên bridge in Hoàn Kiếm and Ba Đình districts.