A substantiated definition of smart cities is urgently required. In this note, we explore the crossover between smart city and world city network literature. We argue that this crossover can contribute to the theoretical and empirical development of smart city literature. The results show that indeed, besides territorial measures, network measures, e.g. indegree and inward distance, are important in explaining the smartness of cities. Based on this, we recommend that smart cities include city network characteristics in future planning.