List of rivers of Sri Lanka

The following table lists most rivers of Sri Lanka. Since Sri Lanka is a trilingual country, some rivers may have a Sinhala name (i.e. Kalu Ganga), while other have an English name (i.e. Kelani River). In the Sinhala language, Ganga (ගඟ) translates to "river", where as Oya (ඔය) translates to "smaller river". At 335 km (208 mi), the Mahaweli River is the longest river in the island, and has drainage basin covering more than one-fifth of the island.

Map showing the locations of river mouths.

List of major rivers (over 100km in length)
Name Length Source Drainage Location of mouth Ref
Mahaweli River 335 km (208 mi) Horton Plains Trincomalee 08°27′34″N 81°13′46″E [1]
Malvathu River 164 km (102 mi) Dambulla Vankalai 08°48′08″N 79°55′40″E  
Kala Oya 148 km (92 mi) Dambulla Wilpattu 08°17′41″N 79°50′23″E  
Kelani River 145 km (90 mi) Adam's Peak Colombo 06°58′44″N 79°52′12″E [1]
Yan Oya 142 km (88 mi) Ritigala Pulmoddai 08°55′04″N 81°00′58″E  
Deduru Oya 142 km (88 mi) Kurunegala Chilaw 07°36′50″N 79°48′12″E  
Walawe River 138 km (86 mi) Adam's Peak Ambalantota 06°06′19″N 81°00′57″E [1]
Maduru Oya 135 km (84 mi) Maduru Oya Kalkudah 07°56′24″N 81°33′05″E  
Maha Oya 134 km (83 mi) Hakurugammana Negombo 07°16′21″N 79°50′34″E  
Kalu Ganga 129 km (80 mi) Adam's Peak Kalutara 06°34′10″N 79°57′44″E  
Kirindi Oya 117 km (73 mi) Bandarawela Bundala 06°11′39″N 81°17′34″E  
Kumbukkan Oya 116 km (72 mi) Lunugala Kumana 06°48′36″N 81°49′25″E  
Menik Ganga 114 km (71 mi) Namunukula Yala 06°21′49″N 81°31′45″E  
Gin Ganga 113 km (70 mi) Gongala Gintota 06°03′47″N 80°10′27″E  
Mi Oya 109 km (68 mi) Saliyagama Puttalam 08°05′44″N 79°48′37″E  
Gal Oya 108 km (67 mi) Yalkumbura Oluvil 07°18′01″N 81°51′54″E  

List of minor rivers (up to 100km in length)
Name Length Source Drainage Location of mouth Ref
Attanagalu Oya 76 km (47 mi) Kegalle District Negombo Lagoon
Nilwala Ganga 72 km (45 mi) Sinharaja Forest Reserve Indian Ocean 5°57′N 80°32′E
Kanakarayan Aru 70 km (43 mi) Omanthai Chundikkulam Lagoon    
Kotmale River 70 km (43 mi) Horton Plains National Park Mahaweli River    
Parangi Aru 60 km (37 mi) Vavuniya District Palk Strait    
Kehelgamu Oya 50 km (31 mi) Horton Plains Kelani River    
Pali Aru 50 km (31 mi) Puliyankulam Palk Strait    
Maskeliya Oya 40 km (25 mi) Peak Wilderness Sanctuary Kelani River    
Nay Aru 40 km (25 mi) Vavuniya District Palk Strait    
Per Aru 32 km (20 mi) Vavuniya District Nanthi Lagoon    
Mandekal Aru 30 km (19 mi) Mullaitivu District Palk Strait    
Nanu Oya 27 km (17 mi) Pidurutalagala Kotmale River    
Pallavarayankaddu Aru 27 km (17 mi) Mullaitivu District Palk Strait    
Akkarayan Aru 25 km (16 mi) Mullaitivu District Jaffna Lagoon    
Netheli Aru 24 km (15 mi) Mullaitivu District Chundikkulam Lagoon    
Theravil Aru 23 km (14 mi) Mullaitivu District Chundikkulam Lagoon    
Nay Aru 20 km (12 mi) Mullaitivu District Nai Aru Lagoon    
Piramenthal Aru 20 km (12 mi) Mullaitivu District Chundikkulam Lagoon    
Kodalikkallu Aru 19 km (12 mi) Mullaitivu District Nanthi Lagoon    
Valukkai Aru 16 km (10 mi) Jaffna District Jaffna Lagoon    
Kukule River 06°39′10″N 80°05′42″E  
Madu Ganga    
Mavil Aru    
Pusweli Oya    
Verugal Aru    
This list is incomplete; you can help by adding missing items with reliable sources.

See also

References
  1. "Horton Plains National Park". International Water Management Institute. Archived from the original on August 5, 2010. Retrieved 23 November 2009.CS1 maint: unfit URL (link)
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