The increase of urbanization is affecting the urban food system (UFS) in many areas, primarily production, processing, and consumption . The upgrading of the urban food consumption structure not only puts forward higher food production requirements, but also poses a challenge to resource consumption and technological innovation . Considerable case or review studies have been conducted on UFS, but there is no bibliometric review attempting to provide an objective and comprehensive analysis of the existing articles . In this study, we selected 5360 research publications from the core Web of Science collection from 1991 to 2020, analyzing contributions of countries, institutions, and journals . In addition, based on keyword co-occurrence and clustering analyses, we evaluated the research hotspots of UFS . The results show that global research interest in UFS has increased significantly during these three decades . The USA, China, and the UK are the countries with the highest output and closest collaborations . UFS research involves multiple subject categories, with environmental disciplines becoming mainstream . Food security, food consumption, and food waste are the three main research areas . We suggest that food sustainability and resilience, food innovation, and comparative studies between cities should be given more attention in the future.