Abstract Background Changing demographics has led to healthcare systems reorientating healthcare delivery towards the community setting and implementing integrated models of care worldwide. A knowledge gap exists with regards to what elements of integrated care facilitate effective age-attuned healthcare delivery. This systematic review examines the effectiveness of community-based multidisciplinary integrated care strategies with General Practitioner (GP) participation for community-dwelling older adults and describes the level of care integration in each study. Methods PUBMED, EMBASE, CINAHL, Central Register of Controlled Trials in the Cochrane Library and MEDLINE were systematically searched in April 2023. Randomised controlled trials (RCTs) or cluster RCTs that focused on interventions for community-dwelling older adults delivered by health and social care professionals with GPs were included. Two reviewers independently conducted the risk of bias assessment, applied the GRADE tool to quantify the certainty of evidence and used the Rainbow Model of Integrated Care taxonomy to describe the elements of integrated care used within studies. The primary outcome was functional status. Meta-analyses were performed using Review Manager 5.4. Results Twelve trials (14 reports) recruiting 8069 participants across 8 countries were included. Community-based multidisciplinary team (MDT) integrated care demonstrated significant improvements in functional status (standardised mean difference (SMD) 0.21, 95% confidence interval (CI) 0.05-0.37; low certainty evidence), hospitalisation (risk ratio (RR) 0.77, 95% CI 0.63-0.95; very low certainty evidence) and participant satisfaction with care (SMD 0.46, 95%c CI 0.15-0.76; low certainty evidence) from 12-36 months. No statistically significant effects favouring community-based MDT interventions for functional status at 6-month follow-up, Emergency Department presentation, mortality, health-related quality of life, or nursing home admission were established. Conclusion Community-based MDT integrated care with GP participation improves clinical and process outcomes for community-dwelling older adults. Future research should focus on models of integrated care that respond to the needs and preferences of older adults.