While ethics has been an under-researched area in educational technology, it is receiving current recognition as a critical focus for inquiry and development. In this chapter, we review the contribution of ethics as part of the history of professionalization of the field, the development of a code of ethics for the profession, and contemporary ethics issues like cultural competence, intellectual property, accessibility and universal design, critical theory in educational technology, system ethics, and social responsibility of professionals. In addition, this chapter presents major theoretical and philosophical models for ethics that pertain specifically to technology in educational systems along with implications of research from other fields exploring the integration of ethics into policy, standards, and higher education curricula. Existing research on ethics in educational technology programs suggests a very low level of integration in such domains at present; findings from a survey of the curricular landscape and implications for future research and development are discussed along with consideration of ethics as a foundational component not only to professional standards, practices, and leadership, but also to education policy, as we highlight the role of faculty and graduate programs, practicing professionals, and scholarly associations in shaping future directions and research in this emerging domain.