This study looked into the rate and pattern of neuropsychological impairment in patients with traumatic brain injury patients at three months post injury. Forty patients attending the neurosurgery outpatient clinic were included in the study. Benton visual retention test (BVRT), rey auditory verbal learning test (RAVLT), digit span test, trail making test (TMT) and mini mental state examination (MMSE) were used for assessment. Forty five percent (n=18) sustained moderate to severe head injury. Twenty five percent (n=10) have abnormal MMSE result. Forty two and a half percent (n=17) have abnormal BVRT result. Seventy five percent (n=30) have abnormal RAVLT result while 35% (n=14) have abnormal digit span test result. Seventy seven and a half percent (n=31) have at least one neurological deficit. There was significant association between severity of head injury (GCS score) and neuropsychological deficit. This study highlights the point that in post head injury patients, there are high occurrences of cognitive dysfunction. MMSE and GCS play a significant and important role in assessing cognitive dysfunction. Severity of head injury as determined by GCS scores also influence the outcome in patients with head injury.