Background: hypertensive disorders of pregnancy (HDP) are important disorders complicating 5% to 10% of all pregnancies and they are a leading cause of maternal and fetal morbidity and mortality and associated with subsequent development of chronic hypertension. Aim of the work: this study aimed to determine the incidence and risk factors that predict chronic hypertension after delivery in women with hypertensive disorders of pregnancy. Patients and Methods: this cohort prospective study was conducted at Ain Shams University, Maternity Hospital. This study included a sample of 207 pregnant women with hypertensive disorders of pregnancy, followed up for persistence of hypertension after 3 months postpartum. Results: the subjects were categorized into case group (n=25, 12.1%) included patients diagnosed as chronic hypertension at the postpartum period and the control group (n =182, 87.9%) included the rest of the study subjects. Clinical and demographic factors were evaluated. By multivariate regression analysis, age, gestational age at diagnosis, parity, preeclampsia and early onset hypertension with end-organ dysfunction were predictors of progression to chronic hypertension. Conclusion: 12.1% of women diagnosed with HDP continued with persistent hypertension after delivery and some clinical and demographic risk factors such as old maternal age at HDP, lower gestational age at diagnosis, multiparous women, preeclampsia and hypertension with end-organ dysfunction were predictors of progression to chronic hypertension. Recommendations: further studies on a larger scale of patients are needed to confirm the current results.