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(Date of Deposit in brackets)
| Afghanistan (1970) | Albania (1990) |
| Algeria (1995) | Andorra (1996) |
| Angola (1996) | Antigua & Barbuda (1985) |
| Argentina (1995) | Armenia (1993) |
| Australia (1973) | Austria (1969) |
| Azerbaijan (1992) | Bahamas (1976) |
| Bahrain (1988) | Bangladesh (1979) |
| Barbados (1980) | Belarus (1993) |
| Belgium (1975) | Belize (1985) |
| Benin (1972) | Bhutan (1985) |
| Bolivia (1970) | Bosnia & Herzogovina (1994) |
| Botswana (1969) | Brazil (1998) |
| Brunei (1985) | Bulgaria (1969) |
| Burkina Faso (1970) | Burundi (1971) |
| Cambodia (1972) | Cameroon (1969) |
| Canada (1969) | Cape Verde (1979) |
| Central African Republic (1970) | Chad (1971) |
| Chile (1995) | China (1992) |
| Colombia (1986) | Comoros (1995) |
| Congo (1978) | Costa Rica (1970) |
| Cote d'Ivoire (1973) | Croatia (1992) |
| Cuba (2002) | Cyprus (1970) |
| Czech Republic (1993) | Democratic Peoples Republic of Korea (North Korea) (1985)* |
| Democratic Republic of Congo (Zaire) (1970) | Denmark (1969) |
| Djibouti (1996) | Dominica (1984) |
| Dominican Republic (1971) | Ecuador (1969) |
| Egypt (1981) | El Salvador (1972) |
| Equatorial Guinea (1984) | Eritrea (1995) |
| Estonia (1992) | Ethiopia (1970) |
| Fiji (1972) | Finland (1969) |
| France (1992) | Gabon (1974) |
| Gambia (1975) | Georgia (1994) |
| Germany (1975) | Ghana (1970) |
| Greece (1970) | Grenada (1975) |
| Guatemala (1970) | Guinea (1985) |
| Guinea-Bissau (1976) | Guyana (1993) |
| Haiti (1970) | Holy See (1971) |
| Honduras (1973) | Hungary (1969) |
| Iceland (1969) | Indonesia (1979) |
| Iran (1970) | Iraq (1969) |
| Ireland (1968) | Italy (1975) |
| Jamaica (1970) | Japan (1976) |
| Jordan (1970) | Kazakhstan (1994) |
| Kenya (1970) | Kiribati (1985) |
| Kuwait (1989) | Kyrgyzstan (1994) |
| Laos (1970) | Latvia (1992) |
| Lebanon (1970) | Lesotho (1970) |
| Liberia (1970) | Libya (1975) |
| Liechtenstein (1978) | Lithuania (1991) |
| Luxembourg (1975) | FYRO Macedonia (1995) |
| Madagascar (1970) | Malawi (1986) |
| Malaysia (1970) | Maldive Islands (1970) |
| Mali (1970) | Malta (1970) |
| Marshall Islands (1995) | Mauritania (1993) |
| Mauritius (1969) | Mexico (1969) |
| Micronesia (1995) | Moldova (1994) |
| Monaco (1995) | Mongolia (1969) |
| Morocco (1970) | Mozambique (1990) |
| Myanmar (1992) | Namibia (1992) |
| Nauru (1982) | Nepal (1970) |
| Netherlands (1975) | New Zealand (1969) |
| Nicaragua (1973) | Niger (1992) |
| Nigeria (1968) | Norway (1969) |
| Oman (1997) | Palau (1995) |
| Panama (1977) | Papua New Guinea (1982) |
| Paraguay (1970) | Peru (1970) |
| Philippines (1972) | Poland (1969) |
| Portugal (1977) | Qatar (1989) |
| Republic of Korea (South Korea) (1975) | Romania (1970) |
| Russia (1970) | Rwanda (1975) |
| St. Kitts and Nevis (1984) | St. Lucia (1979) |
| St. Vincent & the Grenadines (1984) | Samoa (1975) |
| San Marino (1970) | SaoTome & Principe (1983) |
| Saudi Arabia (1988) | Senegal (1971) |
| Seychelles (1985) | Sierra Leone (1975) |
| Singapore (1976) | Slovakia (1993) |
| Slovenia (1992) | Solomon Islands (1981) |
| Somalia (1970) | South Africa (1991) |
| Spain (1987) | Sri Lanka (1979) |
| Sudan (1973) | Suriname (1976) |
| Swaziland (1969) | Sweden (1970) |
| Switzerland (1977) | Syria (1968) |
| Tajikistan (1994) | Tanzania (1991) |
| Thailand (1972) | Timor Leste (2003) |
| Togo (1970) | Tonga (1971) |
| Trinidad & Tobago (1986) | Tunisia (1970) |
| Turkey (1980) | Turkmenistan (1994) |
| Tuvalu (1979) | Uganda (1982) |
| Ukraine (1994) | United Arab Emirates (1995) |
| United Kingdom (1968) | United States (1970) |
| Uruguay (1970) | Uzbekistan (1992) |
| Vanuatu (1995) | Venezuela (1975) |
| Viet Nam (1982) | Yemen (1979) |
| Yugoslavia (1970) | Zambia (1991) |
| Zimbabwe (1991) |
States that have not signed and ratified the NPT (3): India, Israel, Pakistan.
Note: 189 states have signed and ratified the NPT. This total does not include Taiwan. It does include North Korea, which announced its withdrawal from the NPT in 2003.
Source: UN Treaties webpage, http://disarmament.un.org:8080/TreatyStatus.nsf
© 2004 The Acronym Institute.