Sadako Ogata (緒方 貞子: Ogata Sadako; born 1927) is a Japanese scholar and administrator. She served as the United Nations High Commissioner for Refugees from 1991 until 2001. Now she is the chief of the board of Japan International Cooperation Agency .

She was born in Tokyo. Her mother was a daughter of Inukai Tsuyoshi and influenced by his liberal political attitude. She was graduated from University of the Sacred Heart, Tokyo and later studied in Georgetown University and University of California, Berkeley. She taught international politics at Sophia University.