Fluoride (F) contamination in drinking water is a growing concern across the globe due to its harmful consequences on living beings. Effective removal of F from any source of drinking water is necessary. Biochar, a carbon-rich compound, has emerged as a cost-effective, eco-friendly, and sustainable F-removal material in recent years. Biochar has a lot of charged groups and a large surface area, which makes it easier to get rid of F through adsorption, ion exchange, surface complexation, precipitation, and chemisorption. This chapter discusses these processes. These processes are discussed in this chapter. This chapter also addresses how the physical and chemical properties of biochar influence its F removal efficiency, followed by various surface modification techniques (physical, chemical, magnetic, impregnation, or microbial) designed to enhance this capacity. We thoroughly analyze factors such as pH, dosage, initial fluoride concentration, co-existing ions, feedstock type, and preparation temperature that affect the performance of biochar-based adsorbents. Performance evaluations compare biochar with conventional water treatment methods, demonstrating biochar's potential as a viable alternative. Sustainability considerations and recycling of biochar are also discussed in this chapter. Finally, the chapter addresses the challenges and limitations of using biochar for fluoride removal, identifies research gaps, and suggests opportunities for further optimization and innovation.