In response to the global call for environmental stewardship, sustainable banking is emerging as a powerful force in shaping the future of finance. This article explores the principles of sustainable banking, the integration of environmental, social, and governance (ESG) criteria, and how financial institutions are championing green finance for a more sustainable and equitable world. Defining Sustainable Banking: Sustainable banking, also known as green banking or ethical banking, involves financial institutions incorporating environmental and social considerations into their business practices. These considerations go beyond profit-making to prioritize long-term sustainability and positive societal impact. Key Principles of Sustainable Banking: Environmental Responsibility: Sustainable banks commit to environmentally responsible practices, including reducing their carbon footprint, investing in renewable energy projects, and avoiding financing activities harmful to the environment. Social Impact: Sustainable banking emphasizes positive social impact, promoting financial inclusion, supporting community development, and ensuring fair and ethical treatment of all stakeholders, from customers to employees. Governance and Accountability: Strong governance and accountability are central to sustainable banking. This includes transparent reporting on ESG metrics, ethical decision-making at all levels, and responsible management of financial resources.