Tuberculosis (TB) is the second leading cause of death from infectious disease globally with its impact more dramatic in resource limited settings. Individuals with human immunodeficiency virus (HIV) infection who also develop tuberculosis represent a significant challenge to TB control. This study was carried out to determine the prevalence of TB–HIV coinfection and pattern of infection among TB patients. We also compared treatment outcome among coinfected patients with those not coinfected.A six-year retrospective review of records of patients managed at the Tuberculosis Treatment Center of the LAUTECH Teaching Hospital, South-Western Nigeria from January 2009 to December 2014 was carried out.One hundred and five (26.3%) of the 399 TB patients seen in the study period were coinfected with HIV. About 10% of the subjects had extrapulmonary tuberculosis. Treatment failure was significantly worse among patients who had both HIV and TB compared with those who had TB only (49.5% vs. 32%, p = 0.001). Death rate was also higher in the coinfected individuals implying a poorer clinical outcome.High prevalence of TB–HIV coinfection and poor treatment outcome in this group of individuals, though predictable, calls for a more concerted effort in the management of TB–HIV coinfection.