Interior design is one of the most important artistic and technical fields that contribute to improving the built environment and enhancing the quality of life within various spaces. This field relies on applying a set of principles and elements to achieve a balance between aesthetic and functional aspects, ensuring comfortable and efficient environments that meet users’ needs and align with their expectations. The Concept of Interior Design Interior design is defined as a professional process aimed at planning, organizing, and coordinating the interior spaces of buildings in a way that ensures integration between form and function. This process includes selecting materials, coordinating colors, arranging furniture, and utilizing lighting to create a harmonious environment that supports optimal use of space. While closely related to architecture, interior design focuses on fine internal details that directly impact user comfort and the quality of the spatial experience. Elements of Interior Design Interior design relies on a set of core elements that form the framework for designers, including: Space Space serves as the foundation upon which design components are built. It involves studying dimensions, movement patterns, and the distribution of functions across rooms and corridors, reflecting how individuals use the interior space. Lighting Lighting plays a pivotal role in highlighting aesthetic features and enhancing the overall ambiance, whether through natural or artificial sources. It also contributes to visual comfort and sets the general mood of the space. Colors Colors affect the user’s psychological state and perception of space. Selecting a harmonious color palette helps create a comfortable, balanced environment that reflects the design’s identity and characteristics. Furniture Furniture is a key element in interior design, combining aesthetic and functional aspects. It should be selected according to the nature of use, space size, and the chosen style. Style Style represents the overall artistic direction of the design, whether modern, classical, industrial, or otherwise. It defines the visual character of the space and influences how users perceive the environment. Details Details include secondary elements such as artwork, accessories, and decorations, which add a personal touch and give the space visual depth and a distinctive identity. The Importance of Interior Design Interior design is highly important due to its ability to improve quality of life by creating spaces that facilitate movement, enhance comfort, and support functional performance in homes, offices, and various institutions. It also contributes to mental well-being by providing harmonious spaces that promote a sense of balance and satisfaction. Beyond its aesthetic role, interior design helps optimize the use of resources and space, enhancing efficiency both practically and visually. Conclusion In conclusion, interior design is a creative and professional practice that focuses on understanding user needs and utilizing available resources to create balanced spaces that combine comfort and beauty. This field remains a significant factor in shaping modern lifestyles by offering design solutions that improve interior environments and elevate the quality of spatial experiences Almustaqbal University, The First University in Iraq