The contemporary way of life that involves urbanization, environmental pollution, exploitation of natural resources, overpopulation, and poor living standards is not sustainable in the long run. Therefore, the key challenge of modern society is to achieve sustainability in all aspects of life. To achieve this, a new approach to thinking is necessary, which includes multidisciplinarity, innovation, and a deep and comprehensive understanding of the concept of sustainability. In this sense, Information and Communication Technologies (ICT) play a crucial role because they enable increased productivity, social and economic development, as well as continuous monitoring and management of resources to ensure their optimal use. This has been especially influenced by the application of the Internet of Things (IoT) and the latest generation of communication infrastructure, such as 5G networks, as well as advances in managing large amounts of data. In this context, the aim of this paper is to analyze the relationship between ICT and the concept of sustainable development using the example of smart cities. An empirical study has shown that most young people frequently use modern ICT and mostly agree that they have a positive impact on reducing environmental pollution, rational use of resources, and contributing to sustainable development. The research also revealed that young people are quite willing to invest in smart devices such as smart home systems. However, most respondents want more frequent communication with the city administration through digital platforms. According to the results obtained, respondents believe that smart governance and smart people, which are characteristics of smart cities, contribute the most to sustainable development and quality of life.