Antoinette Monsio Sayeh (born 12 July 1958 in Monrovia, Liberia) is a Liberian economist and Deputy Managing Director of the International Monetary Fund (IMF).

[2] Sayeh is a graduate of Swarthmore College and The Fletcher School of Law and Diplomacy, where she received her MA and Ph.D. in International Economic Relations.

She said her main tasks were reducing the high national debt, organising the state banking and financial system, and fighting corruption.

[3] From 2007, Sayeh was a member of the World Bank Group’s High Level Advisory Council on Women's Economic Empowerment, which was chaired by Danny Leipziger and Heidemarie Wieczorek-Zeul.

[5] During the legislative period, Antoinette Sayeh moved to the management of the International Monetary Fund (IMF) as Director of the Africa Department in July 2008; in this role, she is now one of the most influential African politicians in the world.