Globalization and civilization development are progressing in the world, according to statistics people have been migrating from rural areas to cities for many years. At the moment, this phenomenon is noticeable in every place and country, regardless of the state of affluence, level of development or other factors. Some developed countries such as Japan have urbanization at 97.6%. Along with the development of cities, problems also arise. One of the largest is the management of large municipal units. It should be noted that in addition to ordinary areas such as public transport and clean air, there are also extremely important as urban community management. Smart City concepts are created to coordinate activities in urban areas, but also outline development directions for the future. The author focuses on the analysis of information processes in Smart City and proper knowledge management thanks to electronic tools such as Resident Portal. Only fully coordinated and properly managed communication between residents, stakeholders and municipal authorities is able to strengthen and develop cities.