Background: Breast cancer is one of the most prevalent forms of cancer in women and one of the most severe and significant public health concerns in developing nations. This study aimed to determine the prevalence of breast tumors and women’s preventive behavior. Methods: A descriptive, correlational cross-sectional design was employed for this study. The study was conducted at (jeddah). Participants were selected during the period from September to November 2022. Population of this study were adult women (Aged >18 years) at KSA. Study instruments consisted of the following domains sociodemographic data, anthropometric measurements, information related to menstrual cycle and pregnancy, obstetric history, family history, practices of breast self-examination, procedures of early detection and knowledge, attitude and practice assessment for methods of prevention. Results: The study included 420 women of different ages. Breast cancer was found among 82 women (19.5%). The mean age among all study participants was 33.96 + 14.79 years with median age of 28 years. More than half of study participants had normal BMI (n= 220, 52.4%) while third participants were overweight (n= 136, 32.4%). Among participants, 18.1% had a history of post-partum complications, 38.3% had undergone previous surgery, 1.4% had experienced vascular moles, 18.6% had a history of fibroid uterus, 6% had cervical polyps, and 5% had endometriosis. Table 3 presents obstetric history among study participants. More than half of study participants underwent previous hysteroscopy (n= 235, 56%). On the other hand, 81 women had a family history of breast cancer (19.3%). Most of women in this study perform self-examination of the breast (n= 300, 71.4%) and 102 women underwent fine needle aspiration procedure (FNA) (24.3%). The FNA result was positive among 81 women. Furthermore, 124 women underwent mammography (29.5%) and the result was positive among 67 participants. Breast cancer is found among 82 women (19.5%). Women in this study agreed that they should have clinical breast examination at any time (n= 191, 45.5%) while other women believed they should have this examination in certain circumstances such as mastodynia (n= 61, 14.5%), history of benign breast tumors (n= 38, 9%), obesity (n= 37, 8.8%) and family history of breast cancer (n= 32, 7.6%). Conclusion: Breast cancer prevalence was 19.5%. Urban residency was predominant, with varying educational levels. Marital status, income, family size, and work differed among participants. Chronic conditions and diverse anthropometric measurements were observed. Obstetric history showed early marriage and delivery ages, limited abortions, and varied complications. Family history indicated links to chronic diseases and cancers. Participants exhibited awareness about breast cancer risk factors and methods for early detection.