Background: Balance alterations in the postoperative Cochlear Implant (CI) surgeries vary from 31 to 75% (Bonucci et al., 2008). Objective and Methods: this cross-sectional study comprised 20 adults who underwent unilateral cochlear implantation. They were compared to 20 well-matched controls. The aim was to assess balance function in CI recipients using sensory organization test (SOT) of computerized dynamic posturography (CDP) and to compare the findings with vestibular evoked myogenic potential (VEMP) which assesses the vestibulo-colic reflex, another vestibulo-spinal reflex test; and to correlate findings of these 2 tests with the patients’ imbalance symptoms. Results: Vertigo was present in 5/20 CI cases. Eleven had post-operative dizziness. Thirteen out of 20 cases had SOT abnormalities, 10 of which had vestibular ratio abnormality. The cases had a statistically significant lower SOT composite score, equilibrium & strategy scores in conditions 4, 5 and 6 as well as vestibular, visual & visual preference ratios than their controls. There was a statistically significant correlation between the vestibular ratio and post-operative vertigo and dizziness, and between composite score and post-operative dizziness. Eleven out of 20 had preserved VEMP response, out of which 6 had normal VEMP and 5 had abnormal inter-aural difference in amplitude, which was statistically significantly lower than controls. The remaining 9 had lost VEMP irrespective of the tested side. Statistically significant differences with regard to P13 latency were found comparing implanted & non- implanted ears, as well as comparing each of these with the controls. There was no statistically significant correlation between patients’ age, duration of sensory deprivation, implant duration or total hearing loss duration with any of the posturographic or VEMP parameters. And both tests were not correlated. Conclusion: Balance dysfunction is not uncommon in CI recipients post-operatively, requiring vestibular rehabilitation. We recommend adding CDP and VEMP to the routine pre-and post surgical testing.