The subject of research in this paper is religious tourism, its manifestations and development in the context of sustainability. Although selective forms of tourism do not have the form of mass, the increasing number of religiously motivated tourists on a global level cannot be ignored every year. In this paper, the concept of religious tourism is explained, its historical development, and the most important destinations of religious tourism in the world are described and some numerical indicators of tourist trends and their (economic) effects in these destinations are given. The main purpose of this work is to analyze the attitudes of the local population in the area of Medjugorje regarding the sustainability of Medjugorje as a religious destination, as well as the attitudes and opinions of employers in tourism, that is, caterers regarding the level of application of the principles of sustainable development in business. The conducted survey gave an insight into the thoughts of the local community and revealed how they actually feel about the large number of tourists and whether it affects their daily life and obligations. Also, conducting the survey gave an answer to the burning question of applying the principles of sustainable development in hospitality, whether restaurateurs aim to reduce the negative impact of their business, whether they use any measures and whether they are moving in the direction of sustainability.