This special issue of Science, Technology, & Human Values assembles papers that consider relations among science, ethics, and justice. The papers are drawn from a 2011 National Science Foundation-sponsored workshop that brought together interdisciplinary scholars to consider, incorporate, and attend to the meanings, uses, and social consequences of ethical questions and justice ideals in technoscientific projects. The papers included in this special issue examine key areas that emerged from this workshop, including public participation, the production of knowledge, what counts as consent, ownership of biomaterials, and others. Together, the papers raise questions about new directions and articulations of power, justice, and inequalities in science and technology studies.