This study aimed to assess the associations between mental health conditions, individual and job characteristics and sleep disturbances among firefighters. Of 303 participants, 51.2% reported sleep disturbances. Psychological distress and psychosomatic disturbances were significantly associated with sleep disturbances. Suicidal ideation, unhealthy alcohol use and time as a firefighter were also associated with sleep disturbances but at a borderline level of significance (0.05 < p < .085). These findings may be related to the psychological and physical hazards of firefighting and indicate the importance of research on associated professions.