Background: The Coronavirus pandemic of 2019 has seen a rapid surge in cases and deaths since its first detection in Wuhan, China, in December 2019. The purpose of the study was to assess the pregnant women's and maternity nurses' knowledge regarding coronavirus (COVID-19). Design: A descriptive cross-sectional research design was utilized. Sample: A purposive sample of 290 pregnant women and a convenience sample of 40 maternity nurses were enrolled. Settings: The current study was conducted at the outpatient clinic of the Obstetrics department of Birket El Sab Hospital and MCH centers in Al-Birr Al-Sharqi and Al-Birr Al Gharbi in Birket El Sab. Results: the study findings reported that there was a poor knowledge score among the pregnant women and an average knowledge score among the maternity nurses regarding the Coronavirus (COVID-19). Conclusion: Most of the studied pregnant women had poor knowledge scores, and the majority of the studied maternity nurses showed an average knowledge score regarding the Coronavirus (COVID-19). Recommendations: Increasing the level of knowledge of pregnant women regarding coronavirus and providing training programs to the maternity nurses in hospitals and MCH is essential to improve their knowledge regarding coronavirus.