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The rapid growth of urban populations has increased the demand for intelligent and highly connected city infrastructures. Traditional communication technologies like 4G, Wi-Fi, and ZigBee face limitations in bandwidth, latency, reliability, and scalability for handling numerous IoT devices. This project presents a 5G-based Smart City Communication Prototype, demonstrating how next generation networks enable real-time monitoring, data processing, and automated control of essential city services. The prototype integrates IoT sensors, a microcontroller (ESP32/Raspberry Pi), a 5G module, and cloud/edge computing to create an intelligent communication framework. The prototype highlights 5G’s advantages for smart city applications: higher data rates, massive device connectivity, improved reliability, and seamless integration of multiple services on a single network. Applications include smart traffic control, environmental monitoring, public safety, energy management, and emergency response. The results confirm that 5G enhances communication speed, responsiveness, and scalability compared to existing technologies. Overall, the project demonstrates that 5G-enabled communication is a robust solution for building sustainable, automated, and intelligent urban ecosystems.