Background: In January 2020, the World Health Organization declared the COVID-19 outbreak a global public health emergency. Medical preparedness and community education are the most valuable preventive tools for combatting this pandemic. The objective of this study was to assess the role of media public health awareness campaigns on the knowledge of the general population about COVID-19 in Rawalpindi, Pakistan.Methods: A quantitative study using a pre-post design among 384 respondents was conducted. To recruit study participants, a systematic random sampling technique was used. A structured questionnaire was administered to the participants twice: The first response (t1) from participants was filled in during the first week in February 2020 before any confirmed cases were reported in the country, and the second response (t2) was completed one month after the first case detection in Pakistan (March 2020). Media health awareness campaigns were launched just after the detection of the first case in Pakistan. Data was analysed by computing descriptive statistics and paired t-tests to measure the level of association between variables.Results: Exposure to the media and knowledge relating to COVID-19, particularly its symptoms and frequent handwashing as a preventive measure, increased over time. Whereas only a quarter of respondents judged the isolation of suspected cases in quarantine to be important to prevent the spread of infection in society at t1, more than half did so at t2. The same increase was visible in relation to the statement that a lockdown helps to follow social distancing. Socio-demographic characteristics were not significantly associated with knowledge (gains). However, more frequent use of electronic media is associated with greater knowledge gains from t1 to t2.Conclusions: The findings of this study provide evidence that awareness and knowledge related to COVID-19 symptoms and preventive measures increased significantly over time. The increased frequency of following the media indicates that health awareness campaigns are important for enhancing the knowledge of the general public regarding COVID-19.