This paper focuses on the marketing of non-profit organizations and its application in the Nobilis Association. Findings indicate the importance of non-profit organizations nowadays and their focus on creating positive changes in society and its environment. The theoretical part defines the terms of non-profit organizations, their classification, the problems that come with their establishment and analyzes the marketing strategy of a non-profit organization, which also explains PEST and SWOT analysis, marketing mix and mission, vision and goals of the organization. In the applicative part, the application of non-profit organizations marketing is shown on the example of the Nobilis Association. The association was founded with the aim of developing environmental consciousness of citizens, preserving nature and promoting sustainable development. The organizational structure of the Association is presented in this paper and it shows in which way the Association is financed and which methods are used to attract the volunteers. The Nobilis Association aims to focus most on the education of younger generations, but older citizens are not excluded from joining the projects and programs offered by the Association. At the very end of the work, the details of the products (projects) of the Association are given, as well as the prices of organized workshops and the ways in which the Association realizes its promotion and distribution.