The structure of the telecommunications market is an extremely important factor in the development of each country. Generally, it can be said that the structure of the market is moving from a monopoly, which initially defined the Croatian market, through liberalization into an oligopolistic market, and then finally into a market of monopolistic competition. The mobile networks industry is characteristically a natural monopoly since only a limited number of companies can remain within the market equilibrium, regardless of the size of the market. The aim of this research is to determine the characteristics and specifics of the telecommunication market in Croatia. Furthermore, by conducting an in-depth analysis of the telecommunication services in Croatia, conclusions will be drawn about the current market competitors, the marketing aspect as well as the legal regulations within this field.