Today, social media marketing has created a significant upward trend in the marketing activities of football clubs, with many goods and services being exchanged electronically. Therefore, this study, with an applied objective and a pragmatic paradigm, aims to examine the factors influencing the development of social media marketing strategies for Iranian Premier League football clubs. To achieve this, the Delphi and fuzzy Delphi methods were utilized, drawing on the expertise of 20 specialists in sports marketing and social media. Initially, semi-structured interviews were conducted with experts, addressing key questions about marketing strategies. These questions included influential factors, digital marketing methods, challenges, and solutions for improving media performance. Based on the collected opinions, a 31-item questionnaire was designed. To ensure accuracy and comprehensiveness, the fuzzy Delphi method was employed to analyze the experts' opinions in an integrated manner. This approach helped achieve group consensus and reduce potential biases. Additionally, fuzzy numbers were used to fuzzify the data and bring the results closer to reality. The findings of the research indicate that exchange marketing strategy, relational marketing strategy, database marketing strategy, knowledge-based marketing strategy, and customer-oriented marketing strategy can have valuable functions in enhancing the effectiveness of social media marketing activities of Iranian Premier League football clubs. This is achieved by fostering customer loyalty and satisfaction, enhancing brand recognition and awareness to increase brand identity, increasing market share, and understanding the relative quality and price of products, developing new products, increasing sales, and reducing marketing costs. The results of the study confirm these findings. The outcomes of this research can provide suitable strategies for developing social media marketing activities in the football industry.