Introduction: There are many factors that affect gingival health. The primary factor that leads to the development of periodontal disease is poor oral hygiene. The influences of periodontal diseases on systemic health have been reported through research conducted in recent years. Preterm and low birth weight is a significant problem in developed and developing countries. In literature, it has been shown that periodontal health is associated with preterm birth and low birth weight. The aim of this study is to evaluate the knowledge of pregnant women from Eastern Black Sea region of Turkey regarding their periodontal health and awareness on the issue. Material and Methods: Research includes pregnant women who volunteered to take part in the study, after having consulted the clinic of obstetrics and gynecology of two distinct centers in Trabzon and Giresun between the dates July 2018 and December 2018. Data was collected from surveys structured by researchers, filled in by the patients themselves. In the survey data regarding the pregnancy information of the volunteers, periodontal health awareness, personal and socio-economic variables were also examined. Results: In the study, of the 397 pregnant women with a mean age of 30.1 ± 5.3; %30.7 were college graduates and %35 were high school graduates. It was realized that a minority of the pregnant women (%16.8) had knowledge about the dental plaque and %32.6 knew the harmful effects of the dental plaque. In addition, %51.4 of pregnant women have stated that bleeding of the gums represented periodontal disease. Our study shows that even though majority of pregnant women (%80.1) do not know the main reason of periodontal disease and only %15.1 know periodontal disease may lead to preterm birth; %56 believe that tooth brushing frequency should be increased during pregnancy. Conclusion: The data obtained through this study revealed that pregnant women have insufficient knowledge and low awareness level regarding their dental and periodontal health. In order to prevent periodontal disease and obstetric complications, which may result from periodontal disease such as preterm birth, during antenatal period, pregnant women, should be provided with the needed knowledge on these subjects through educational programs. Such programs should be planned and knowledge should be increased.