In the rapidly evolving landscape of urban development, Smart Cities are emerging as the future of sustainable and connected living, aiming to improve the quality of life for citizens while enhancing the efficiency of urban services. Central to the success of these Smart Cities is robust digital infrastructure, with fiber optic networks providing a foundational backbone. This white paper explores how fiber optic technology enables the vision of Smart Cities, offering unparalleled bandwidth, reliability, and scalability to support a vast array of digital services and applications. Fiber optic networks are uniquely positioned to handle the digital and intelligent transformation demands of various fields in Smart Cities, including municipal, education, healthcare, hospitality, transport, public safety systems, and so on. By facilitating low-latency, high-capacity connections, fiber optics support real-time data flow, which is critical for responsive urban environments. Additionally, fiber optics’ energy efficiency and durability make it an eco-friendly choice for cities looking to reduce their environmental impact while building sustainable infrastructures. However, deploying fiber networks comes with challenges, including significant infrastructure costs, regulatory hurdles, and the need for strategic partnerships to support deployment and long-term maintenance. This white paper addresses these issues, presenting actionable insights into overcoming these obstacles to ensure a successful fiber rollout. Through real-world case studies, we examine cities that have successfully implemented fiber networks to become more resilient, adaptable, and responsive to citizen needs. Looking to the future, we discuss emerging technologies, such as 5G and advanced IoT solutions, that will further enhance the role of fiber optics in enabling Smart Cities. This white paper concludes with a roadmap for cities considering fiber optic deployment, highlighting key considerations for policymakers, city planners, and private sector partners. Fiber optic networks are not only foundational to current Smart City initiatives but also critical to future advancements, making them a wise, future-proof investment for cities worldwide.