The Asian Development Bank (ADB) is a founding PRIF partner, together with the Australian Agency for International Development (currently the Australian Department of Foreign Affairs and Trade), the New Zealand Agency for International Development (currently the New Zealand Ministry of Foreign Affairs and Trade) and the World Bank Group.

ADB is a development bank with 68 members that works in Asia and the Pacific to eradicate extreme poverty and support efforts towards a prosperous, inclusive, resilient, and sustainable region. ADB works with member countries, and partners to provide loans, technical assistance, grants, and equity investments that promote social and economic development. ADB operations in the Pacific commenced in 1969 to strengthen infrastructure and services, build human and institutional capacity, and increase the resilience of communities across the region.