A newly discovered coronavirus, COVID-19, creates a new infectious illness. According to current clinical observations, people's age and gender appear to have a role in their vulnerability to COVID-19. This research aims to see whether there is an association between gender, age, and COVID-19 susceptibility in the public health department of Najaf. The study included 36607 subjects (evenly distributed between sexes), and their ages ranged from (<10 - 80) years. According to the study's findings, males were found to be more infected than females. Results of the research indicated that gender and Covid-19 had a strong correlation. According to the study, people between the ages of 30 and 39 were more common than people of other ages range. The study's findings revealed a significant difference between Covid-19 and the participants' ages. Keywords. Covid-19; Gender; Age; Najaf; Iraq.