Noodle soup refers to a variety of soups with noodles and other ingredients served in a light broth. Noodle soup is a common dish across East Asia, Southeast Asia and the Himalayan states of South Asia. Various types of noodles are used, such as rice noodles, wheat noodles and egg noodles.

Soup is a primarily liquid food, generally served warm or hot, that is made by combining ingredients of meat or vegetables with stock, milk, or water. Hot soups are additionally characterized by boiling solid ingredients in liquids in a pot until the flavors are extracted, forming a broth. Soups are similar to stews, and in some cases there may not be a clear distinction between the two; however, soups generally have more liquid (broth) than stews.