Aortic coarctation is a congenital malformation of the aorta usually diagnosed and corrected early in life. Long-term survival is exceptional in patients with untreated aortic coarctation. In this case report, we present a late diagnosis of aortic coarctation in a 72-year-old female. Our patient was relatively asymptomatic until she presented with exertional dyspnea and fatigue in her seventh decade of life. The patient was managed conservatively with aggressive antihypertensive medication. After the 1-year follow-up visit, the patient was in good clinical condition, without, however, adequate control of blood pressure.