Interiors research since 1966 is reviewed. Interior research is defined as data-based research applicable to the field of interior design. The only publications considered are those currently applicable and appropri-ate for the design professions: interior design and architecture. A discussion of applicability of design research is presented first. Then, an organization is developed to include basic knowledge, the design pro-cess (people, places and process) and analysis. Next, the important contributions of research are presented according to the organization that had been developed. Finally, conclusions and recommendations are made.