Researchers are becoming increasingly interested in biopolymers as a cutting-edge industry. Because of their flexibility, reusability, and toughness, polymeric materials are advantageous. To create polymeric composites, these biopolymers can be combined with a variety of other natural and synthetic materials. These composite materials resemble oil-based polymers in terms of their characteristics. Biopolymers are crucial to the medicine and pharmaceutical industries as well. In this chapter, cellulose, chitin, and chitosan—three well-researched biopolymers—are briefly discussed along with common processing methods and material characterization. Biopolymers can be used for commercial objectives