Objectives: We sought to examine stressors and coping strategies adopted by Omani adults during the COVID-19 pandemic and explore the relationships between coping strategies (avoidant and approach coping) and sociodemographic characteristics. Methods: This national cross-sectional survey was conducted throughout Oman between September and December 2020. An online questionnaire was distributed to collect information concerning sociodemographic characteristics, potential stressors experienced during the pandemic, and coping strategies. Results: A total of 790 Omani adults submitted completed questionnaires (response rate 88.4%). High, moderate, and low stress were reported by 492 (62.3%), 139 (17.6%), and 159 (20.1%) participants, respectively. Approach coping mechanisms received a higher mean score than avoidant mechanisms (22.01±6.55 vs. 8.88±4.80). Regarding specific coping strategies, planning had the highest mean score (5.15±1.31), followed by acceptance (4.95±1.34), religion (4.56±1.52), and positive reframing (4.28±1.89), while substance use (0.01±0.19) was the least reported followed by humor (0.86±1.43), denial (0.97±1.56), and behavioral disengagement (1.02±1.60). Associations were observed between the different coping strategies and participants' gender, age, marital status, exercise level, and stress level (p ≤ 0.05). Conclusions: During a large-scale pandemic, the psychological impact on the general population is significant, even among individuals not infected with the disease. These results underscore the need for a mental health support system in Oman that can address the general population's needs. Public education on coping strategies and stress management may be helpful.