Nowadays, many people, organizations and associations are engaged in certain activities that are found in the concept of marketing. Marketing is an activity that combines supply and demand, ie contributes to consumers in the spectrum of getting to know a product or service; it enables communication between producers and consumers. Good marketing is the key to success, but also the opinions of people who are constantly changing about how good marketing actually looks. It is necessary to carefully plan and use the most appropriate means to achieve the intended goal so that the end result shows the success of all activities. Marketing is found in various branches and industries, most often with branded products that pay for marketing activities and raise consumer awareness of their image. Also, when it comes to marketing, tourism is closely related, which largely depends on marketing activities and the promotion of destinations, activities and events. With the development of marketing, tourism is developing and tourist destinations are becoming recognizable in the world. In the Republic of Croatia, the most famous tourist destination is the Adriatic coast, which attracts tourists from various countries around the world to spend the summer in Croatian resorts and thus generates a large income that contributes to the state budget. In the east of Croatia, in Osječko-baranjska County, there are various attractions and tourist offers that, with the help of marketing, seem attractive to visitors. Thanks to its cultural heritage, tradition and natural basis, Slavonia is a great success in tourist arrivals and overnight stays. Human and natural potential are two key components of success in tourism, but also in economic terms - and they are the backbone of the beginning of tourism activities in Osijek-Baranja County of the Republic of Croatia.