INTRODUCTION Interior designers are beginning to address environmental issues as they acknowledge the importance of sustainable interior design. While some interior designers are using environmentally sustainable design criteria in their design solutions, research that investigates how they apply it as a component for design problems has not been done. Knowing the state of practice will provide a base to develop education strategies for sustainable interior design. Interior design educators can identify less frequently applied components of sustainable design and develop teaching methods to improve the understanding of specific components. Continuing education courses can be developed for interior design practitioners as well. Therefore, this study examined the state of environmentally sustainable interior design practice.