['To assess the sound localization abilities of subjects unilaterally implanted with a hybrid cochlear implant in different sound localization conditions.', 'A prospective, single-subject repeated measures design was performed to assess the sound localization abilities in 5 different listening conditions: combined (hybrid cochlear implant and contralateral acoustic hearing), bimodal, bilateral acoustic, ipsilateral acoustic, and contralateral acoustic.', 'Tertiary referral center.', 'Eighteen subjects with bilateral low-frequency residual hearing, implanted with a hybrid cochlear implant, were enrolled in this study.', 'Postoperative sound localization in 5 different listening conditions.', 'Average group results showed a significant improvement in sound localization for all binaural hearing conditions (combined, bimodal, and bilateral acoustic) over monaural conditions (ipsilateral acoustic and contralateral acoustic). Subjects performed significantly better in the combined condition compared with the bimodal and bilateral acoustic conditions when sound was presented from the front and the side of their cochlear implant.'] Do sound localization abilities of unilateral hybrid cochlear implant users with bilateral low-frequency hearing?