In an era of increasing internet connectivity, social media has emerged as a transformative force, facilitating global connectivity and communication. Small and Medium-scale Enterprises (SMEs) often grapple with challenges in managing resources and networks, hindering their growth potential. This study examined the influence of sustainable social media marketing on SME performance in Oke-Ilewo, Abeokuta, Ogun State. Hinged on Technological Determinism and Media Richness theories, the study employed a descriptive survey design with 384 SMEs sampled using a simple random sampling technique. Findings revealed that sustainable social media marketing significantly enhances SME sales performance and fosters customer engagement. The study highlights the importance of SMEs investing in sustainable social media marketing to drive business growth. Additionally, it recommends that policymakers offer workshops to facilitate SMEs’ adoption of sustainable social media marketing practices. By integrating sustainability principles into social media marketing strategies, SMEs would enhance their performance and contribute to broader sustainable development goals.