Background and Purpose: The importance of paying attention to mosques, as sacred places, and the emphasis of Islam on its hygiene is clear. Overlooking this issue leads to the dissemination of pathogens and endangers the health of people visiting these places. In this study, we aimed to investigate the environmental health status of mosques in Sari, Iran, with respect to personal health, tools and equipment, as well as construction status.Materials and Methods: The information of each mosque was recorded in a questionnaire comprised of 45 variables, and each response was allocated a percentage. Overall, 50 mosques were randomly selected in 2016. After collecting hygiene information, data were entered into Excel software and analyzed using descriptive cross-sectional statistical methods.Results: Overall, 42.9%, 26.7%, and 30.4% of the mosques had undesirable, desirable, and moderate health statuses, respectively. In terms of construction, 13.5% of the mosques lacked the variables under investigation. In this regard, 53.7%, 25.6%, and 7.2% of the mosques were in desirable, moderate, and unfavorable conditions, respectively. In terms of tools and equipment, 9.7% of the mosques did not have the variables under study, and 48.8%, 32.8%, and 8.7% of the mosques were in desirable, moderate, and unfavorable conditions, respectively.Conclusion: The obtained findings indicate the poor individual health status of mosques, which is very important for the health of the people using them. The health status of mosques in Sari city in terms of tools and equipment and construction was moderate. Generally, the health status of mosques in Sari city was lower than expected.