Gastrointestinal (GI) carcinomas is a term for group of cancers that affect the digestive system. This includes oesophageal, gallbladder, liver, pancreatic, stomach, and bowel cancers. Young-onset colorectal cancer (CRC) is defined as CRC that manifests in people under the age of 50 years. The incidence of CRC in young people has increased by 2% to 8% annually. Small bowel cancer is one of the rare types of cancer as its incidence accounts for less than 1% of all other types of cancer in the United States. Most of these tumors occur in older adults; > 90% of cases occur in people older than 40 years. Here, we are presenting four cases of young onset GI carcinomas. GI carcinomas is now being reported in younger population, therefore it is important to be aware of symptoms and risk factors in them. Here, we are presenting four cases of young onset GI carcinomas in female patients aged 22 and 24 and two male patients aged 21 and 32.