How many member countries are part of the Asian Development Bank as of October 2023?

As of October 2023, the Asian Development Bank (ADB) has 68 member countries. This number includes both regional and non-regional members. ADB's membership is designed to facilitate regional economic cooperation and development. The inclusion of various countries reflects the Bank's mission to foster economic growth and social development across Asia and the Pacific, bringing together a diverse group of nations with the common goal of promoting sustainable development and reducing poverty in the region.

The membership base has evolved since ADB's establishment in 1966, starting with only 31 founding members and gradually expanding to its current number. Each member country plays a role in decision-making processes and contributes to the financing of projects and initiatives through the bank.