Uncontrolled hypertension remains a significant problem in daily clinical practice worldwide. Few data are available on blood pressure control in hospitals. The aim of this study was the frequency of uncontrolled hypertension and associated risk factors in hypertensive patients followed at the general referral hospital of Boma in the province of Kongo Central in the Democratic Republic of Congo From January 1 to May 31, 2019; we conducted a cross-sectional and descriptive study at the Boma reference hospital located in the southeast and 440 Km from Kinshasa, the capital of DR Congo. Included was any hypertensive patient aver 18 years and informed consent. Information on demographic parameters, behavioral lifestyles, anthropometric and biological (blood sugar, creatinine, urine strip and lipid profile ) and blood pressure (BP) measurements was obtained. Hypertension was defined as an average of two BP ≥ 140/90 mmHg. Independent factors associated with control hypertension were identified using logistic regression analysis. P<0.05 defined the level of statistical significance. The prevalence of uncontrolled hypertension was 62 % BP control was observed in 150 (38.0%) of 395 treated hypertensive participants mainly in men than women (68.3 vs 53.3 %; p=0.001). Age <60 years (p=0.005), no smoking ( p=0.047), no Central obesity (p=0.008), CKD ( stade 1 vs 2 ) (p=0.065) , and no hypercholesterolemia ( p= 0.014) emerged as associated with control hypertension. Uncontrolled hypertension was common in our hospitals.Therapeutic lifestyle changes and pharmacological treatment are necessary for hypertensive participants.