Nowadays, knowledge is considered as one of the most valuable assets of an enterprise which has to be managed efficiently and effectively in order to gain a competitive advantage in the knowledge economy era. Knowledge Management (KM) evolved into a strategic management approach, finding application not only in the business world but also in other areas such as education, government and healthcare. In this way, the new link between KM and KBD created the appropriate environment for the advent of a new concept in the scientific and practitioners’ communities, the concept of “Knowledge City” (KC). Nowadays, the theme of KCs is a ‘hot’ topic of interest and discussion. The process for developing a KC, is neither quick nor simple. This seems to be already understood by the research community, which the last few hears has begun to concentrate its efforts so as to develop appropriate frameworks, methodologies, tools, systems, etc so as to support the development of KCs. In this context, and given that there are still many pending issues, this article attempts to propose a taxonomy of KC research, by co instantaneously presenting the status with these major themes of KC research. The discussion presented on this article should be of value to researchers and practitioners.