--- - |2+ Abstract Background Sexual behaviour towards another person who does not or cannot consent to it causes serious harm to its victims. Understandable tendencies towards isolating or shaming the offenders, however, may actually increase risks of recidivism and further such harms. Aim The study aims to consider evidence for the effectiveness of interventions for sex offenders, mainly in a U.K. context, across four areas: criminal justice system programmes, medication, interventions for sex offenders with personality disorder and a community‐based model for the reintegration—Circles of Support and Accountability, and identify key evidence gaps. Methods We searched for reviews in the following four strands of work—psychosocial programmes, medication, personality focused therapies, and Circles of Support and Accountability—and identified gaps in knowledge. Findings Randomised controlled trials in this field are rare but have been achieved. Findings from more naturalistic outcome studies of sex offender treatment programmes are disappointing, but recidivism rates among released sex offender prisoners are low, regardless. Medication relying on substantial physiological change raises substantial ethical concerns. Not all sex offenders have a mental disorder but up to half have been diagnosed with a personality disorder, which may need specific treatment. Evidence is growing that lay work such as Circles of Support and Accountability is a valuable adjunct to other interventions. Conclusions and Implications for Future Research In this field, where tensions between attributions swing between “madness” and “badness,” there is growing evidence for optimism that complexity of history and presentation can be met through cooperation between the many disciplines, integrative strategies, and wider community engagement. The need now is for large, prospective controlled trials of interventions, with long periods of follow‐up. Perhaps, the most exciting developments have come from the wider public. More research into the qualities of these volunteers might inform public education and health strategies supporting wider safety. - 'Criminal Behaviour and Mental Health, Volume 29, Issue 4, Page 227-238, August 2019. '