Membership in the IWC is open to any nation that adheres to the 1946 International Convention for the Regulation of Whaling. As of February, 2010, a total of 88 nations belong to the International Whaling Commission.

• Antigua & Barbuda
• Argentina
• Australia
• Austria
• Belgium
• Belize
• Benin
• Brazil
• Bulgaria
• Cambodia
• Cameroon
• Chile
• China, People’s Rep of
• Congo, Rep of the
• Costa Rica
• Côte d’Ivoire
• Croatia
• Cyprus
• Czech Republic
• Denmark
• Dominica
• Dominican Republic
• Ecuador
• Eritrea
• Estonia
• Finland
• France
• Gabon
• Gambia, The
• Germany
• Ghana, Rep of
• Greece
• Grenada
• Guatemala
• Guinea-Bissau
• Guinea, Rep of
• Hungary
• Iceland
• India
• Ireland
• Israel
• Italy
• Japan
• Kenya
• Kiribati
• Korea, Rep of
• Laos
• Lithuania
• Luxembourg
• Mali
• Marshall Islands, Rep of
• Mauritania
• Mexico
• Monaco
• Mongolia
• Morocco
• Nauru
• The Netherlands
• New Zealand
• Nicaragua
• Norway
• Oman
• Palau
• Panama
• Peru
• Poland
• Portugal
• Romania
• Russian Federation
• San Marino
• St. Kitts & Nevis
• St. Lucia
• St. Vincent & The Grenadines
• Senegal
• Slovak Republic
• Slovenia
• Solomon Islands
• South Africa
• Spain
• Suriname
• Sweden
• Switzerland
• Tanzania
• Togo
• Tuvalu
• UK
• Uruguay
• USA