Open science advocates argue that making data sets, studies, methodologies, and other aspects of research free from publication fees and available to scholars will increase collaborations, access, and dissemination of knowledge. In this article, I argue that open access policies and practices raise both feminist and ethical issues. I reflect on the five themes of feminist ethics identified 20 years ago by a task force of the Society for the Psychology of Women. I update the themes with recent scholarship of feminist philosophers and ethicists, and I use the themes to raise questions about the promises and challenges of open access. Throughout, I offer suggestions for all who seek to make knowledge of human psychology more complete and more accessible to more people. I conclude by offering recommendations informed by feminist ethics to those building the policies and practices of open access.