The aim of this paper is to attempt to determine the factors which influence the choice of locations of industries, i.e. industrial and free zones, by conducting a survey among the directors and managers of several companies. This subject was partially elaborated during the fieldwork with the 3rd year students in 2007, when several companies, free zones and industrial zones were visited, and structured interviews about the locations of certain companies and the contentment of their users were conducted. Each of the locations was influenced by specific factors which determined the course of business for the mentioned subjects of research. Another aim of this paper is to explain the terms such as industrial zone, free zone, commercial zone and economic zone.