BACKGROUND & AIMS: Data on the clinical characteristics of patients with inflammatory bowel diseases (IBDs) with coronavirus disease 2019 (COVID-19) are scarce. The aim of our systematic review was to investigate symptoms and diagnostic-therapeutic management of IBD patients with COVID-19. METHODS: We searched PubMed, Embase, Web of Science, and MedRxiv up to July 29, 2020, to identify all studies reporting clinical information on adult and pediatric IBD patients with confirmed COVID-19. RESULTS: Twenty-three studies met our inclusion criteria, including 243,760 IBD patients. COVID-19 was diagnosed in 1028 patients (509 with Crohn's disease [49.5%], 428 with ulcerative colitis [41.6%], 49 with indeterminate colitis [4.8%], and 42 with missing data [4.1%]), accounting for a cumulative prevalence of 0.4%. Viral infection occurred more frequently in males than in females (56.5% vs 39.7%), and the mean age ranged from 14 to 85 years. The most common symptoms were fever (48.3%), cough (46.5%), and diarrhea (20.5%), and a COVID-19 diagnosis was achieved mainly through polymerase chain reaction analysis of nasopharyngeal swabs (94.4%) and chest computed tomography scans (38.9%). Hydroxychloroquine (23.9%), lopinavir/ritonavir (8.2%), steroids (3.2%), and antibiotics (3.1%) were the most used drugs. Overall, approximately a third of patients were hospitalized (30.6%), and 11.4% of them required admission to the intensive care unit. In total, 29 COVID-19-related deaths were reported (3.8%), and increasing age and the presence of comorbidities were recognized as risk factors for COVID-19 and negative outcomes. CONCLUSIONS: Diarrhea occurs more frequently in IBD patients with COVID-19 than in the non-IBD population. Further studies are needed to define the optimal diagnostic-therapeutic approach in IBD patients with COVID-19.