Guk may refer to'
- Guk (Korean name), Korean surname
- Guk (food), generic term referring to soup-like dishes in Korean cuisine
- Aspergillus oryzae in Korean
Guk , also sometimes known as Tang , is a class of soup-like dishes in Korean cuisine. Guk and tang are commonly grouped together and regarded as the same type of dish, although guk is more watery and a basic dish for the Korean table setting, and is usually eaten at home; tang has less water than guk and has been developed for sale in restaurants.