Background:Coronavirus disease 19 is a pandemic affecting millions worldwide. Since February 2020, new cases are reported in Saudi Arabia, and regulations have been imposed to control the spread of the disease and raise awareness. This study aimed to assess the knowledge and attitudes of the Kingdom’s residents toward coronavirus disease 19 during the early stages of the pandemic.Method:A cross-sectional study of 2071 participants who were recruited from various cities in Saudi Arabia. An online questionnaire was shared through social media, which contained questions about demographic data, general knowledge of coronavirus disease 19, and participants’ attitudes.Results:The mean age of the study population was 34 ± 12.4 years. Most of the participants agreed that coronavirus disease 19 is a pandemic and is more serious than seasonal influenza. More than 90% believed that handwashing and social distancing are effective in preventing disease transmission. No significant results were observed when comparing the knowledge of high-risk participants and the normal population. More than half of the cohort were strictly compliant with curfew regulations, handwashing, and face mask. Around 80% of the population is following coronavirus disease 19 news and information through official authorities’ press releases.Conclusion:The Kingdom of Saudi Arabia residents showed decent knowledge of coronavirus disease 19. Nevertheless, some information needs emphasizing and proper education. Frequent communication between healthcare authorities and the public is highly recommended.