鹅肝（法语：foie gras，英语发音：/ˌfwɑːˈɡrɑː/，字面意为“脂肪肝”）是一种从被过份喂饲的鹅取出来的肝。根据法国法律，鹅肝的定义的是通过管饲法强制喂养谷物的鹅或者鸭的脂肪肝。尽管在西班牙和其他法国以外的国家偶尔会以强制喂饲的方式获得。

鹅肝是法国著名的料理。其口味通常被描述成肥厚的、油润的和可口的，不同于一般的鹅或者鸭的肝脏。鹅肝通常以整块贩售，或是制成慕斯、芭菲或pâté，以及佐餐。法国法律声明“鹅肝是受保护的法国文化和烹饪技艺遗产”。

用于获取鹅肝的饲养技术起于前25世纪，当时古埃及人通过养鸟来获得食物，并且有意通过强行喂饲的方式来养肥。今天，法国是最大的生产国和消费国，即使鹅肝的生产和消费已经拓展至世界，特别是在其他欧洲国家、美国和中国。

Foie gras (/ˌfwɑːˈɡrɑː/, French for "fat liver") is a luxury food product made of the liver of a duck or goose that has been specially fattened. By French law, foie gras is defined as the liver of a duck or goose fattened by force-feeding corn with a feeding tube, a process also known as gavage. In Spain and other countries outside France it is occasionally produced using natural feeding. Ducks are force-fed twice a day for 12.5 days and geese three times a day for around 17 days. Ducks are typically slaughtered at 100 days and geese at 112 days.