This special issue explores intersections of feminism, postcolonialism, and technoscience. The papers emerged out of a 2014 research seminar on Feminist Postcolonial Science and Technology Studies at the Institute for Research on Women and Gender, University of Michigan. Through innovative engagement with rich empirical cases and theoretical trends in postcolonial theory, feminist theory, and STS, the papers trace local and global circulations of technoscience. They illuminate ways in which science and technology are imbricated in circuits of state power and global inequality and in social movements resisting the state and neocolonial orders. The collection foregrounds the importance of feminist postcolonial STS to our understandings of technoscience, especially how power matters for epistemology and justice.