Here is the list of countries from which Clickbank accepts affiliates.

UNITED STATES
CANADA
BRITAIN
AUSTRALIA
FRANCE
GERMANY
SPAIN
MEXICO
APO/FPO
Aland Is
Albania
Andorra
Anguilla
Antarctica
Antigua & Barbuda
Argentina
Armenia
Aruba
Australia
Austria
Bahamas
Bahrain
Barbados
Belgium
Belize
Bermuda
Bhutan
Bolivia
Botswana
Bouvet Is
Brazil
Brunei
Bulgaria
Cambodia
Canada
Cape Verde
Cayman Is
Chile
China
Christmas Is
Cocos Is
Colombia
Comoros
Cook Is
Costa Rica
Croatia
Cyprus
Czech Republic
Denmark
Diego Garcia
Dominica
Egypt
El Salvador
Estonia
Falkland Is
Faroe Is
Fiji
Finland
France
French Guiana
French Polynesia
French Southern Terr
Gambia
Georgian Republic
Germany
Ghana
Gibraltar
Greece
Greenland
Grenada
Guadeloupe
Guam
Guatemala
Guernsey Is
Haiti
Heard & McDonald Is
Honduras
Hong Kong
Hungary
Iceland
India
Indonesia
Ireland
Isle Of Man
Israel
Italy
Jamaica
Japan
Jersey Is
Jordan
Kiribati
Korea, South
Kuwait
Kyrgyzstan
Latvia
Lesotho
Liechtenstein
Lithuania
Luxembourg
Macao
Macedonia
Malaysia
Maldives
Mali
Malta
Marshall Is
Martinique
Mauritius
Mayotte
Mexico
Micronesia
Monaco
Montenegro
Montserrat
Morocco
Namibia
Nauru
Netherlands
Netherlands Antilles
New Caledonia
New Zealand
Nicaragua
Niue
Norfolk Is
Northern Mariana Is
Norway
Oman
Pakistan
Palau
Panama
Paraguay
Peru
Philippines
Pitcairn Is
Poland
Portugal
Puerto Rico
Qatar
Reunion Is
Romania
Russian Federation
Samoa, East
Samoa, West
San Marino
Sandwich Is
Sao Tome & Principe
Saudi Arabia
Seychelles
Singapore
Slovak Republic
Slovenia
Solomon Is
South Africa
Spain
Sri Lanka
St Helena
St Kitts & Nevis
St Lucia
St Pierre & Miquelon
St Vincent & Grenadines
Suriname
Svalbard & Jan Mayen Is
Swaziland
Sweden
Switzerland
Taiwan
Thailand
Tokelau
Tonga
Trinidad & Tobago
Tunisia
Turkey
Turks & Caicos Is
Tuvalu
Ukraine
United Arab Emirates
United Kingdom
United States
Uruguay
USA Minor Outlying IS
Uzbekistan
Vanuatu
Vatican
Venezuela
Vietnam
Virgin Is, UK
Virgin Is, US
Wallis & Futuna Is
Western Sahara
Yemen