Oral health is a fundamental component of overall health and well-being. However, significant disparities in oral health outcomes persist across populations due to socioeconomic inequalities. Socioeconomic factors such as income, education, occupation, housing conditions, healthcare accessibility, and social environment profoundly influence oral health behaviors, disease prevalence, and access to dental care. This review explores the relationship between socioeconomic determinants and oral health outcomes, emphasizing the mechanisms through which social inequalities contribute to dental caries, periodontal diseases, tooth loss, oral cancers, and reduced quality of life. Evidence from developed and developing countries demonstrates that disadvantaged populations experience a disproportionately higher burden of oral diseases. Addressing socioeconomic disparities through policy interventions, public health programs, and equitable healthcare systems is essential for improving global oral health outcomes.