The nonprofit sector has developed into a significant force in both the economy and society on a global scale. This chapter provides a brief overview of the nonprofit sector with a special focus on Romania. The main objective is to clarify the critical importance of marketing to nonprofit organizations and other organizations in this area. We will define the basic concepts of nonprofit marketing, review best practices, introduce a model of the nonprofit marketing mix, and demonstrate their practical application through case studies that serve as a paradigmatic marketing model for nonprofit organizations operating in emerging economies.