Blockchain technology is poised to revolutionize library operations by offering solutions to enhance data security, streamline transactions, and ensure transparency. This chapter explores the multifaceted applications of blockchain in libraries, focusing on managing digital collections, implementing smart contracts for automated transactions, and optimizing interlibrary loan systems. By leveraging blockchain's decentralized ledger and smart contract capabilities, libraries can improve the integrity of cataloging and metadata management, protect patron privacy through secure authentication mechanisms, and automate complex workflows with increased efficiency. However, the adoption of blockchain faces challenges such as technical complexity, financial feasibility, and compliance with legal and ethical standards. Addressing these challenges requires collaboration, pilot testing, and continuous adaptation of policies to ensure responsible implementation.