This final (master) thesis, analyses the tourism trends and the impact of tourism on the economy in the Republic of Croatia in the period from 2016 until 2020. The target of this thesis is to determine the changes in tourism trends in the observed period, related thereto the share of tourism in the gross domestic product, that is the impact of tourism on the Croatian economy. The introduction to the subject matter of this thesis is made by explaining the fundamental definitions and strategic guidelines from the scope of tourism and tourism industry and presenting the Bodies in the tourism system. The thesis continues with the analysis of the trends of tourist supply and tourist demand, in a manner that a comparison of the results of each year to the previous is made, in order to establish the growth or decrease of tourist traffic. In the second part of the thesis, the impact of tourism on the economy is presented by researching the data on the share of tourism in the gross domestic product, the balance of payments of goods and services, and through SWOT analysis. The carried out research determined continuous growth of tourist traffic and continuous growth of the share of tourism in the total gross domestic product from 2016 to 2019, however an immense decline caused by the global pandemic in 2020. It can be concluded that tourism in the Republic of Croatia has a strong impact on the country's economy and that, after the end of the current extraordinary circumstances causing a great negative impact on the functioning and development of tourism, tourist traffic ought to grow again (although probably very gradually and probably not as immensely as in the period 2016 to 2019). Thus, the contribution of tourism will remain of significant importance to the economy of the Republic of Croatia.