This comprehensive review examines the potential and challenges of using industrial and agricultural waste streams as feedstocks for biodiesel production. The study highlights the environmental benefits, such as reducing greenhouse gas emissions and ecological contaminants, and the economic viability of this sustainable energy solution. It covers various categories of industrial waste, including waste oils, greases, manufacturing residues, and byproducts from agricultural and chemical companies. The review delves into the essential components of biodiesel synthesis, including feedstock characterization, pre-treatment, transesterification, and purification methods. Each feedstock's unique characteristics and obstacles are discussed to foster a thorough understanding of the biodiesel manufacturing process. The study also explores regulatory considerations and emerging trends in the industry, emphasizing the potential of utilizing waste-based biodiesel to promote a circular economy and optimize resource utilization. The implementation of this sustainable practice in India is particularly significant, aiming to enhance energy security, economic stability, and environmental sustainability.This comprehensive review examines the potential and challenges of using industrial and agricultural waste streams as feedstocks for biodiesel production. The study highlights the environmental benefits, such as reducing greenhouse gas emissions and ecological contaminants, and the economic viability of this sustainable energy solution. It covers various categories of industrial waste, including waste oils, greases, manufacturing residues, and byproducts from agricultural and chemical companies. The review delves into the essential components of biodiesel synthesis, including feedstock characterization, pre-treatment, transesterification, and purification methods. Each feedstock's unique characteristics and obstacles are discussed to foster a thorough understanding of the biodiesel manufacturing process. The study also explores regulatory considerations and emerging trends in the industry, emphasizing the potential of utilizing waste-based biodiesel to promote a circular economy and optimize resource utilization. The implementation of this sustainable practice in India is particularly significant, aiming to enhance energy security, economic stability, and environmental sustainability.