Carbohydrate polymers are integral to cosmetic formulations, offering diverse functionalities crucial for product efficacy. From enhancing texture and viscosity to providing moisturization and stability, these polymers play pivotal roles. Their bioactive properties further contribute to skincare benefits, promoting hydration and skin health. Understanding their significance is essential for optimizing cosmetic formulations and achieving desired sensory experiences. This chapter presents an overview of the significance of carbohydrate polymers in cosmetics, discussing their diverse functions and properties. It explores commonly used types such as cellulose derivatives, starch derivatives, hyaluronic acid, and alginate, and delves into their roles as thickening agents, emulsifiers, moisturizing agents, and film formers. Furthermore, it examines their applications across various cosmetic products, formulation considerations, and future trends, emphasizing their role in driving innovation within the industry.