AIM:To assess and compare the knowledge of obstructive sleep apnea (OSA) among final years dental students, interns, dental practitioners and faculty working in and around Riyadh.METHODS:A questionnaire-based study comprising of 16 questions was conducted among final year dental clinical students, interns, dental practitioners and faculty working in and around Riyadh. Statistical Package for Social Sciences software (SPSS version 21) was used to analyse the statistical data. The p < 0.05 was considered statistically significant.RESULTS:A total of 450 respondents took part in the study. When gender comparison was done regarding the awareness of OSA, statistically significant differences were noted for the majority of questions. The response rate for the knowledge-based questions varied statistically concerning their speciality and educational qualifications. 65% of the participants admitted that they were unaware of the diagnostic tests performed for diagnosing these patients. It was noted that 85% of the participants wanted to attend a CDE program to know more about OSA.CONCLUSION:The study concludes that there is a significant lack of knowledge among final year students, interns and general dentists. This study emphasises the need for all dental professionals to regularly update their knowledge and equip themselves to identify and treat such patients at an early stage.