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AimsThere is increasing interest in the role of peer support in diabetes care. However, technology‐mediated peer support in paediatric type 1 diabetes remains understudied.We aimed todescribe technology‐mediated peer support interventions for children living with type 1 diabetes, their caregivers and healthcare providers.MethodsCINAHL, Embase and MEDLINE (Ovid) were searched from Jan 2007 to June 2022. We included randomised and non‐randomised trials with peer support interventions for children living with diabetes, their caregivers and/or healthcare providers. Studies examining clinical, behavioural or psychosocial outcomes were included. Quality was assessed with the Cochrane risk of bias tool.ResultsTwelve of 308 retrieved studies were included, with a study duration range of 3 weeks to 24 months and most were randomised trials (n = 8, 66.67%). Four technology‐based interventions were identified: phone‐based text messages, video, web portal and social media, or a hybrid peer support model. Most (58.6%, n = 7) studies exclusively targeted children with diabetes. No significant improvement was observed in psychosocial outcomes (quality of life, n = 4; stress and coping, n = 4; social support, n = 2). Mixed findings were observed in HbA1c (n = 7) and 28.5% studies (n = 2/7) reported reduced incidence of hypoglycaemia.ConclusionsTechnology‐mediated peer support interventions may have the potential to improve diabetes care and outcomes. However, further well‐designed studies are necessary that address the needs of diverse populations and settings, and the sustainability of intervention effects.