Key Facts about Mekong River

Mekong River is the longest river in Southeast Asia.

Key Facts about Mekong River

About Mekong River:

  • It is the longest river in Southeast Asia, the 7th longest in Asia, and the 12th longest in the world.
  • It has a length of about 2,700 miles (4,350 km). 
  • Course:

o It rises in southeastern Qinghai province, China.

o It originates from the Sanjianyuang in the Tibetan Plateau, with the area designated a national nature reserve to protect the headwaters of the Yangtze, Yellow, and Mekong Rivers.

o The river drains approximately 795,000 square kilometers and flows through sixAsian countries: China, Vietnam, Laos, Myanmar, Thailand, and Cambodia, where it is referred to by different names. 

  • Vientiane (Viangchan), the capital of Laos, and Phnom Penh, the capital of Cambodia, both stand on its banks.
  • The river drains into the South China Sea southof Ho Chi Minh City (Vietnam).
  • Tributaries: The left-bank tributaries (draining high rainfall areas) include Nam Ou, Tha, and Nam Khan, while the right-bank tributaries (draining the lower relief region) are Ruak, Kok, Tonle Sap, and Mun.
  • Its biodiversity is only second to the Amazon River Basin and contains about 20,000 plant species, 1,200 birds, 430 mammals, 800 amphibians and reptiles, and 850 fish species.
  • It is the river with the most large fish species, including giant freshwater stingrays, giant pangasius, Mekong giant catfish, and giant barb.

· The Mekong creates a huge delta, or triangular piece of land, in southern Vietnam. The delta has rich soil and is one of the world’s great producers of rice.


Q1: What is the Tibetan Plateau?

It is a vast high plateau of southwestern China. is the most extensive region of elevated topography in the world. It encompasses all of the Tibet Autonomous Region and much of Qinghai province and extends into western Sichuan province and southern Uygur Autonomous Region of Xinjiang.It is surrounded by high mountain ranges, including the Hindu Kush to the west, the Himalayas to the south, the Kunlun Mountains to the north, and the Qilian Mountains to the northeast. It has an elevation exceeding 4500 m (14,800 ft).

Source:Dam project across Mekong River in Laos raises fears

Latest UPSC Exam 2026 Updates

Last updated on January, 2026

→ Check out the latest UPSC Syllabus 2026 here.

→ Join Vajiram & Ravi’s Interview Guidance Programme for expert help to crack your final UPSC stage.

UPSC Mains Result 2025 is now out.

UPSC Notification 2026 Postponed for CSE & IFS which was scheduled to be released on 14 January 2026.

UPSC Calendar 2026 has been released.

UPSC Prelims 2026 will be conducted on 24th May, 2026 & UPSC Mains 2026 will be conducted on 21st August 2026.

→ The UPSC Selection Process is of 3 stages-Prelims, Mains and Interview.

→ Prepare effectively with Vajiram & Ravi’s UPSC Prelims Test Series 2026 featuring full-length mock tests, detailed solutions, and performance analysis.

→ Enroll in Vajiram & Ravi’s UPSC Mains Test Series 2026 for structured answer writing practice, expert evaluation, and exam-oriented feedback.

→ Join Vajiram & Ravi’s Best UPSC Mentorship Program for personalized guidance, strategy planning, and one-to-one support from experienced mentors.

UPSC Result 2024 is released with latest UPSC Marksheet 2024. Check Now!

UPSC Toppers List 2024 is released now. Shakti Dubey is UPSC AIR 1 2024 Topper.

→ Also check Best UPSC Coaching in India

Vajiram Content Team
Vajiram Content Team
UPSC GS Course 2026
UPSC GS Course 2026
₹1,75,000
Enroll Now
GS Foundation Course 2 Yrs
GS Foundation Course 2 Yrs
₹2,45,000
Enroll Now
UPSC Mentorship Program
UPSC Mentorship Program
₹85000
Enroll Now
UPSC Sureshot Mains Test Series
UPSC Sureshot Mains Test Series
₹19000
Enroll Now
Prelims Powerup Test Series
Prelims Powerup Test Series
₹8500
Enroll Now
Enquire Now