Cửu Long
Cửu Long may refer to:
- Mekong River or Cửu Long River, a major river in Southeast Asia
 - Mekong Delta or Cửu Long Delta, region in southwestern Vietnam where the Mekong River empties into the sea
 - Cửu Long Province, a former Vietnamese province in the Mekong Delta
 - 4th Corps (Vietnam People's Army) or Cửu Long Corps, a regular army corps of the People's Army of Vietnam
 
See also
- Operation Cuu Long 44-02, a 1971 operation by South Vietnamese and Cambodian forces to reopen Route 4 in Cambodia
 - Jiulong (disambiguation), Mandarin equivalent
 - Kowloon (disambiguation), Cantonese equivalent
 - 九龍 (disambiguation), logogram equivalent