The ideas of circular economy and bioproducts mark a fundamental shift in our attitude to resource management and sustainable development. The fundamental character of bioproducts, their relevance in advancing a circular economy, and their effects on several sectors and businesses are investigated in this chapter. Bioproducts, made using environmentally friendly techniques and derived from sustainable biological resources like plants, animals, and microorganisms, encompass a range of items including biofuels, bioplastics, biochemicals, and biomaterials. These products serve as practical alternatives to traditional petroleum-based counterparts. By leveraging the natural properties of organic materials and applying innovative technologies, bioproducts offer significant potential to mitigate environmental degradation, reduce carbon emissions, and decrease reliance on finite fossil resources. Achieving the goals of sustainable production and consumption depends on integrating bioproducts within a circular economy paradigm. The ideas of the circular economy help close the material flow loop, reducing waste generation and optimizing resource use. Remanufacturing, reuse, and recycling help one to accomplish this. By converting organic waste streams into valuable resources, enhancing natural biodegradation, and enabling cascading bioreactor systems, bioproducts contribute to improved circularity. Furthermore, using bioproducts supports a regenerative approach to economic development whereby natural resources are preserved, and the benefits of ecosystems are enhanced. This chapter provides an overview of the key aspects of bioproducts and their role in the circular economy.