The paper examines urban tourism in the City of Zagreb, one of the fastest growing types of tourism in the world and a type of tourism that is increasingly characterised by features of mass tourism. The aim of the paper was to classify the tourist attractions in Zagreb, to determine the current development of tourism and to analyse the current state of development of urban tourism in Zagreb. After a theoretical approach to city tourism and an overview of the general characteristics of the City of Zagreb, the first part of the paper classifies the tourist attractions in Zagreb according to the methodology of Kušen (2002), highlighting the attractions based on their tourist attractiveness hierarchy. The second part of the paper outlines the development of tourism in Zagreb since the early 20th century, focussing on the period after the Second World War. The third part analyses the current development of tourism in Zagreb, comparing the period immediately before the COVID-19 pandemic, the period of the pandemic and the post-pandemic period, with a particular focus on tourism supply and demand. The research showed that Zagreb is now one of the most visited tourist destinations in Croatia, even though it has not yet reached pre-pandemic levels. Given the number of tourist arrivals and overnight stays as well as the urban character of the city, tourism pressure in Zagreb is still not pronounced and there is room for growth and development.