Traumatic brain injuries (TBI) often involve vascular dysfunction that leads to longterm alterations in physiological and cognitive functions of the brain. Indeed, all the cells that form blood vessels and that are involved in maintaining their proper function can be altered by TBI. In this review, we focus on the different types of cerebrovascular dysfunction that occur after TBI, ranging from cerebral blood flow (CBF) alterations, autoregulation impairments, subarachnoid hemorrhage (SAH), vasospasms, blood-brain barrier (BBB) disruption and edema formation. We also discuss the mechanisms that mediate these dysfunctions, focusing on the cellular components of cerebral blood vessels (endothelial cells, smooth muscle cells, astrocytes, pericytes, perivascular nerves) and their known and potential roles in the secondary injury cascade.