The objectives of this study were to explore the content of web-based communication on COVID-19 by religious authorities (RAs) in Uganda and to assess the level of integration of the Uganda Ministry of Health (MoH) and World Health Organisation (WHO) COVID-19 risk communication guidelines into the statements released by these RAs. A grey literature review was conducted by searching the websites of intra- and inter-religious bodies for the terms "COVID-19" and "coronavirus". Thematic analysis was used to assess the content of RA statements which were also mapped to the items of the MoH and WHO statements. Results indicate that RA communications were centred on COVID-19 description and management; the need to adhere to established guidelines; and the adoption of health-protective behaviours, notably, social distancing and avoidance of misinformation. RAs also discussed the effects of COVID-19 and its control measures on the population and spoke against pandemic-aggravated injustices (gender-based violence and embezzlement). The RA messages incorporated the WHO statement to a greater extent than the MoH statement. In conclusion, RAs played a critical role in delivering public health messages in Uganda during the COVID-19 pandemic, a position we believe should be maximized by public health authorities for effective communication during emergencies.