© 2022 Taylor & Francis Group, LLC.Esophageal cancer (EC) is the eighth most prevalent malignancy and the sixth leading cause of cancer-related death worldwide. The proportion of older adults with EC has increased dramatically in recent decades due to increased life expectancy. Older patients with EC are at a highest risk of malnutrition and this predicts early death. In older patients with EC, dysphagia is a common symptom; additionally, comorbidities, polypharmacy, and physiological changes of aging such as decreased muscle mass and geriatric issues including altered cognition, mobility, and mood contribute to malnutrition. Chemoradiotherapy (CRT) is the primary treatment for unresectable locally advanced EC patients, as it successfully reduces local recurrence and distant metastases while also extending survival. In older patients with EC, nutrition is an interventional condition, unlike many other geriatric risk factors. Optimizing nutritional support may reduce treatment toxicity and facilitate the completion of definitive or neoadjuvant CRT. The relevance of nutritional status and food intake is becoming more widely acknowledged, and it now encompasses the entire spectrum of EC treatment in older patients, from diagnosis to perioperative care to long-term care. This review aims to discuss the current research on nutritional support in older patients with esophageal cancer undergoing CRT.