The aim of this study was to examine the impact of companion animals on wellbeing amongst individuals living with HIV in Australia. It was hypothesized that participants living with a companion animal would report greater emotional wellbeing than those who did not. It was also hypothesized that participants reporting a stronger attachment to their companion animal would report greater emotional wellbeing. A total of 128 participants (77 with companion animals and 51 without companion animals) were recruited through Australian AIDS Councils. All participants completed measures of HIV-related emotional wellbeing, perceived experiences of HIV-related unsupportive social interactions, selfassessed health, and socio-demographics. Those living with companion animals completed additional items about the animal, including the Lexington Attachment to Pets Scale (LAPS). Sample comparisons indicated that those living with a companion animal had significantly greater emotional wellbeing scores, and reported reduced experiences of HIV-related unsupportive social interactions, compared with those who did not. In addition, multiple regression analyses showed living with a companion animal to be predictive of emotional wellbeing. However, analysis of LAPS scores indicated greater attachment to a companion animal was significantly associated with reduced emotional wellbeing and self-assessed health, and increased reports of HIV-related unsupportive social interactions. It is proposed that some individuals facing increased negative HIV-related challenges may actively seek out a stronger attachment relationship with a companion animal in order to buffer these stressful life conditions. This study provides empirical support for the benefits that companion animals may offer some members of a potentially vulnerable or stigmatized population group, and reinforces the need to validate and support the human-animal relationship.