This paper presents a feminist and community psychology analysis of ethical concerns that can arise throughout the process of doing research with women who are homeless. The unique contexts of the lives of women who are homeless demand that researchers redefine traditional ethical constructs such as consent, privacy, harm, and bias. Research that fails to do this may perpetuate the stereotyping, marginalization, stigmatization, and victimization homeless women face. Feminist and community research ethics must go beyond the avoidance of harm to an active investment in the well-being of marginalized individuals and communities. Using feminist and community psychology ethics, this paper addresses some common problems in research with women who are homeless, and argues for the transformation of research from a tool for the advancement of science into a strategy for the empowerment of homeless women and their communities. (Author)