The list follows the list of member countries of ADB and their respective year of joining.
| Members | Year of Joining |
| Malaysia | 1966 |
| Maldives | 1978 |
| Marshall Islands | 1990 |
| Micronesia, Federated States of | 1990 |
| Mongolia | 1991 |
| Myanmar | 1973 |
| Nauru | 1991 |
| Nepal | 1966 |
| The Netherlands | 1966 |
| New Zealand | 1966 |
| The Netherlands | 1966 |
| Norway | 1966 |
| Pakistan | 1966 |
| Palau | 2003 |
| Papua New Guinea | 1971 |
| Philippines | 1966 |
| Portugal | 2002 |
| Samoa | 1966 |
| Singapore | 1966 |
| Solomon Islands | 1973 |
| Spain | 1986 |
| Sri Lanka | 1966 |
| Spain | 1986 |
| Sweden | 1966 |
| Switzerland | 1967 |
| Taipei,China | 1966 |
| Tajikistan | 1998 |
| Thailand | 1966 |
| Timor-Leste | 2002 |
| Tonga | 1972 |
| Turkey | 1991 |
| Turkmenistan | 2000 |
| Tuvalu | 1993 |
| United Kingdom | 1966 |
| United States | 1966 |
| Uzbekistan | 1995 |
| Vanuatu | 1981 |
| Viet Nam | 1966 |