Biomass feedstock refers to the raw organic materials used in the production of bioenergy, biofuels, and other renewable products. These feedstocks are diverse and can include wood, crop residues, dedicated energy crops, algae, and organic waste materials. The choice of biomass feedstock significantly influences the efficiency and environmental impact of bioenergy production. Woody biomass, sourced from trees and forestry residues, is a common feedstock for bioenergy, offering a renewable alternative to fossil fuels. Agricultural residues, such as crop stalks and husks, contribute to biomass feedstock diversity, utilizing waste materials for energy production. Dedicated energy crops like switchgrass and miscanthus are cultivated specifically for their high energy yield and suitability for bioenergy production. Algae, known for their rapid growth and high lipid content, are emerging as a promising biomass feedstock for biofuel production. Biomass feedstock availability, sustainability, and transportation costs are critical considerations in bioenergy planning. Integrated approaches, combining multiple feedstocks or employing agroforestry systems, enhance the resilience and sustainability of biomass supply chains. Ongoing research focuses on optimizing biomass feedstock production, exploring innovative crops, and improving conversion technologies to maximize the efficiency and environmental benefits of bioenergy production.