The leather industry, a cornerstone of global manufacturing, faces significant environmental challenges due to the substantial waste it generates. Traditional disposal methods exacerbate pollution and resource depletion, necessitating sustainable solutions. Valorization of leather industry waste offers a promising approach, transforming discarded materials into valuable biofuels and chemicals through processes such as anaerobic digestion, pyrolysis, and transesterification. These techniques not only minimize waste but also produce renewable energy sources like biogas and bio-oil. Advances in technology enhance process efficiency and broaden the range of valuable products, including collagen for pharmaceuticals and bioplastics from leather fibers. Despite challenges, such as technological scalability and environmental impact assessment, ongoing research and investment promise a sustainable future where leather waste contributes to a circular economy and mitigates environmental impact.