The International Institute of Administrative Sciences (IIAS) is an international non-profit organization with scientific purposes. IIAS is a federation of member states, national sections, and academic research centres jointly elaborating public administration solutions to the policy challenges of the day. It has been established in 1930 and is headquartered in Brussels, Belgium. The IIAS is also a holding of autonomous international and regional institutions (IASIA, EGPA, AGPA & LAGPA).

The IIAS's vision is to be a key player in setting the governance agenda worldwide. To this end, it fulfills four missions: to organize high-impact events targeting and involving both public service and academe; to produce and disseminate relevant knowledge on public governance; to enable collaborative and strategic projects with members and partners; to accredit both academic and professional training programs in line with standards of best practices in public management.

The IIAS is led by its President Ra'ed Mohammed BenShams and Director General Sofiane Sahraoui.