This study examined the relationship between antiretroviral therapy use, participants' knowledge of partner's HIV serostatus, number of sex partners, perceived infectivity and HIV disclosure to a main sexual partner among 258 HIV-positive Haitian alcohol users. Only 38.6 % had disclosed their HIV serostatus to sexual partners. Logistic regression analyses revealed that participants who self-reported having an HIV-negative partner (OR = 0.36, 95 % CI 0.13-0.97) or a partner of unknown HIV status (OR = 0.09, 95 % CI 0.04-0.22) were less likely to disclose their HIV serostatus than participants who self-reported having an HIV-positive partner. Participants who had more than one sexual partner in the past 3 months (OR = 0.41, 95 % CI 0.19-0.90) were also less likely to disclose than participants who had one partner. These findings suggest the need for couples-based programs to assist people living with HIV (PLWH) with the disclosure process, especially among PLWH who have more than one sexual partner and/or are in serodiscordant relationships.