Natural Fiber Reinforced Composites (NFRCs) are becoming a popular choice as a more environmentally friendly option to synthetic composites due to their ability to decompose naturally and have less of an impact on the environment. Yet, a major limitation on the use of NFRCs is that the hydrophilic (water-loving) properties of the natural fibers and the hydrophobic (water-repelling) properties of the polymers do not work well together. This chapter outlines different surface treat-ments and chemical modifications which can improve the ability of these materials to form bonds, including treatments such as: alkali, silane, acetylation, and more eco-friendly treatments. Finally, the analysis of PLA, PHA, and starch-derived biopolymers will also be included as a class of biopolymer-based matrix polymers to evaluate/how much they contribute to the mechanical, thermal, and morphological characteristics of composites will be presented in this study through several different fabrication methods and characterization methods that support the development of high-quality.