The effectiveness of psychological services provided remotely, telepsychology, for the management of Posttraumatic Stress Disorder (PTSD) was evaluated. Eleven studies (n = 472 participants) were identified from electronic database searches. Study quality was assessed, with studies characterised by small and underpowered samples. Effect sizes and associated confidence intervals (CIs) were calculated to determine the direction and magnitude of treatment change. Short-term treatment gains were reported for internet and video-based interventions. This included significant medium to large improvements (d range = 0.66-3.22) in cognitive and behavioural symptoms of depression, generalised anxiety and posttraumatic stress. However, the equivalence of telepsychology and face-to-face psychotherapy could not be determined, with few comparative studies available. Both treatment gains and deterioration were noted 1 to 6 months following treatment cessation, although this was based on limited follow-up data. Further larger scale and longitudinal research will help to ascertain the minimum requirements for the management and treatment of PTSD in a technology-supported environment.