Members
From 31 members at its establishment in 1966, ADB has grown to encompass 68 members—of which 49 are from within Asia and the Pacific and 19 outside.
ADB Annual Report 2018: Members, Capital Stock, Voting Power
Regional members
| Members | Year of membership |
|---|---|
| Afghanistan | 1966 |
| Armenia | 2005 |
| Australia | 1966 |
| Azerbaijan | 1999 |
| Bangladesh | 1973 |
| Bhutan | 1982 |
| Brunei Darussalam | 2006 |
| Cambodia | 1966 |
| Cook Islands | 1976 |
| Federated States of Micronesia | 1990 |
| Fiji | 1970 |
| Georgia | 2007 |
| Hong Kong, China | 1969 |
| India | 1966 |
| Indonesia | 1966 |
| Japan | 1966 |
| Kazakhstan | 1994 |
| Kiribati | 1974 |
| Kyrgyz Republic | 1994 |
| Lao People's Democratic Republic | 1966 |
| Malaysia | 1966 |
| Maldives | 1978 |
| Marshall Islands | 1990 |
| Mongolia | 1991 |
| Myanmar | 1973 |
| Nauru | 1991 |
| Nepal | 1966 |
| New Zealand | 1966 |
| Niue | 2019 |
| Pakistan | 1966 |
| Palau | 2003 |
| Papua New Guinea | 1971 |
| People's Republic of China | 1986 |
| Philippines | 1966 |
| Republic of Korea | 1966 |
| Samoa | 1966 |
| Singapore | 1966 |
| Solomon Islands | 1973 |
| Sri Lanka | 1966 |
| Taipei,China | 1966 |
| Tajikistan | 1998 |
| Thailand | 1966 |
| Timor-Leste | 2002 |
| Tonga | 1972 |
| Turkmenistan | 2000 |
| Tuvalu | 1993 |
| Uzbekistan | 1995 |
| Vanuatu | 1981 |
| Viet Nam | 1966 |
Nonregional members
| Members | Year of membership |
|---|---|
| Austria | 1966 |
| Belgium | 1966 |
| Canada | 1966 |
| Denmark | 1966 |
| Finland | 1966 |
| France | 1970 |
| Germany | 1966 |
| Ireland | 2006 |
| Italy | 1966 |
| Luxembourg | 2003 |
| The Netherlands | 1966 |
| Norway | 1966 |
| Portugal | 2002 |
| Spain | 1986 |
| Sweden | 1966 |
| Switzerland | 1967 |
| Turkey | 1991 |
| United Kingdom | 1966 |
| United States | 1966 |