Background:  Deep venous thrombosis (DVT) is an a major public health concern and important cause of morbidity and mortality worldwide; with an estimated annual incidence in developed countries 1 to 2 per 1,000 people each year. The study aimed to assess risk factors for deep venous thrombosis among patients admitted to vascular unit through Assessing patients' demographic characteristics, patients' educational needs regarding DVT and risk factors that lead to developing of DVT. Study design: a descriptive exploratory design was be utilized. Setting: this study was conducted at vascular surgical unit of Sohag university hospitals. Subjects: A purposive sample of 75 Patients with DVT were be recruited in the study. Tools of data collection: (1) patient structured interview questionnaire & (2) DVT risk factor assessment Tool. Results: More than half of the studied patients had unsatisfactory level of knowledge towards risk factors for DVT. Major of the studied patients had immobility, fracture, obesity, stroke, malignancy and chemotherapy as risk factors for DVT. There was a significant relation between risk assessment scale for DVT with total knowledge, patients' habits, age, gender, past medical &surgical history and body mass index of the studied patients Conclusion: There were many risk factors for DVT incidence, the most common risk factors related to patients daily habits. While family history and activity of daily living related factors were the least common risk factors. It was concluded that taking oral contraceptive pills were considered significant risk factor for DVT among female studied patients. There was a significant positive correlation between educational level and patients' total knowledge regarding DVT .Recommendation: Designing educational program for patients with DVT to improve their knowledge regarding risk factors for deep vein thrombosis and its potential associated complications with submission of educational handouts, posters, booklets and brochures.