NORTH AMERICA: International River Basin register
(updated August 2012)


AFRICA | ASIA | EUROPE | NORTH AMERICA | SOUTH AMERICA || Footnotes | Original Paper
Basin Name Total area of basin (sq. km) (1)   Country name Area of country in basin (sq. km) Percent area of basin in country (%)

Alsek 28,400 Canada 26,500 93
  United States of America of America 1,800 7
 
Artibonite 8,800 Haiti 6,600 73
  Dominican Republic 2,300 27
 
Belize (43) 11,500 Belize 7,000 62
  Guatemala 4,500 38
 
Candelaria 12,800 Mexico 11,300 85
  Guatemala 1,500 15
 
Changuinola 3,200 Panama 2,900 93
  Costa Rica 300 7
 
Chilkat 3,800 United States of America 2,100 51
  Canada 1,600 49
 
Chiriqui 1,700 Panama 1,500 96
  Costa Rica 200 4
 
Choluteca 7,400 Honduras 7,200 97
  Nicaragua 200 3
 
Coatan Achute 2,000 Mexico 1,700 87
  Guatemala 300 13
 
Coco/Segovia 25,400 Nicaragua 17,900 76
  Honduras 7,500 24
 
Colorado 655,000 United States of America 644,600 98
  Mexico 10,400 2
 
Columbia 668,400 United States of America 566,500 85
  Canada 101,900 15
 
Firth 6,000 Canada 3,800 60
  United States of America 2,200 40
 
Fraser 239,700 Canada 239,100 100
  United States of America 600 <1
 
Goascoran 2,800 Honduras 1,500 52
  El Salvador 1,300 48
 
Grijalva (43) 126,800 Mexico 78,900 62
  Guatemala 47,800 38
  Belize 20 <1
 
Hondo (43) 14,600 Mexico 8,900 57
  Guatemala 4,200 20
  Belize 1,500 13
 
Lempa 18,000 El Salvador 9,500 57
  Honduras 5,800 29
  Guatemala 2,800 14
 
Massacre 800 Haiti 500 54
  Dominican Republic 300 46
 
Mississippi 3,226,300 United States of America 3,176,500 98
  Canada 49,800 2
 
Motaqua 16,100 Guatemala 14,600 89
  Honduras 1,500 11
 
Negro 5,800 Nicaragua 4,800 89
  Honduras 900 11
 
Nelson-Saskatchewan 1,109,400 Canada 952,000 86
  United States of America 157,400 14
 
Paz 2,200 Guatemala 1,400 54
  El Salvador 800 46
 
Pedernales 400 Haiti 200 44
  Dominican Republic 100 56
 
Rio Grande (North America) 656,100 United States of America 341,800 52
  Mexico 314,300 48
 
San Juan 42,200 Nicaragua 30,400 70
  Costa Rica 11,800 30
 
Sarstun (43) 2,100 Guatemala 1,800 93
  Belize 300 7
 
Sixaola 2,900 Costa Rica 2,500 82
  Panama 300 18
 
Skagit 8,000 United States of America 7,100 88
  Canada 900 12
 
St. Croix 4,600 United States of America 3,300 65
  Canada 1,400 35
 
St. John (North America) 47,700 Canada 30,300 63
  United States of America 17,300 37
 
St. Lawrence 1,055,200 Canada 559,000 53
  United States of America 496,100 47
 
Stikine 50,900 Canada 50,000 98
  United States of America 900 2
 
Suchiate 1,600 Guatemala 1,100 74
  Mexico 500 26
 
Taku 18,100 Canada 16,300 90
  United States of America 1,700 10
 
Tijuana 4,400 Mexico 3,100 73
  United States of America 1,300 27
 
Whiting 2,600 Canada 2,000 77
  United States of America 500 23
 
Yaqui 74,700 Mexico 70,100 94
  United States of America 4,600 6
 
Yukon 829,700 United States of America 496,400 60
  Canada 333,300 40