In the study, it is aimed to systematically analyze and visualize the trends of research on smart cities between 1991 and 2021 on a global scale. The data obtained from the Web of Science Core Collection Database were analyzed with the VOSviewer software. In the database, 1809 articles were accessed in the date range determined by the keyword "smart city" in the title category. A systematic bibliometric analysis was conducted including different variables such as citation numbers, leading authors, organizations, keywords, and countries where the articles were written. According to the findings obtained from the analysis, the three most influential journals for a smart city research are Sustainability, Journal of Urban Technology, and Technological Forecasting and Social. The vast majority of studies have been published in the English language. The three most- cited authors are; Park, Dameri and Kim. The most influential institutions are the universities of Huaqiao, Central South, and College London. The findings will help researchers in the field understand the general trend of global smart city research, the level of relevance and performance of variables, and provide guidelines for further research.