This article provides an overview of interior design, covering topics such as the design process, special considerations like sustainability and environmental factors, design principles and elements, color theory, lighting, space planning, furniture arrangement and selection, architectural details, wall and floor treatments, fabric choices, art and accessories, and historic design influences. The main goal is to introduce readers to the various aspects of interior design and how they can be applied in residential and nonresidential settings. Key findings include the importance of prioritizing needs and wants in space planning, the impact of color and lighting on design, and the significance of furniture harmony and human factors in creating functional spaces.