Iphigenia Photaki (, ; also known after marriage as Iphigenia Vourvidou-Photaki, ; 1921–1983) was a Greek organic chemist remembered for her contributions in peptide chemical synthesis, especially in the synthesis of biologically/enzymatically active peptides.
Photaki was in 1965 the fourth woman overall to be habilitated in a scientific discipline in Greece, and the second to do so in the field of Chemistry. She specialised in peptide synthesis, influenced by her mentor and doctoral advisor Leonidas Zervas, a global authority on the subject. After distinguished research in Basel, Athens, and later Cornell, Photaki eventually rose to Professor of Organic Chemistry and Head of the Laboratory of Organic Chemistry of the University of Athens.