INTRODUCTION Th is chapter describes the role of accreditation in assuring the quality of distance education off ered by colleges and universities. Th e chapter focuses primarily on the eff orts of the regional accrediting associations in the United States, although the work of specialized accreditors is also acknowledged. Following a brief historical overview of accreditation, the chapter describes the early work of the Distance Education and Training Council (DETC) to assess distance education programs, then goes on to review how the regional associations developed an approach to the review of distance education and to describe the current practice of the regional associations. Th e chapter concludes with a few remarks about the impact of federal regulations on accreditors’ review of distance education.