What is the name of the famous Thai soup made with shrimp, lemongrass, and chili?

The famous Thai shrimp soup made with lemongrass and chili is Tom Yum Goong. In Thai, goong or kung means shrimp, distinguishing this version from other tom yum soups.

Tom yum is a family of hot-and-sour soups built around aromatic ingredients such as lemongrass, makrut lime leaves, galangal, chili, lime juice, and fish sauce. Tom Yum Goong uses shrimp as its defining protein; shrimp shells and heads may also be simmered to deepen the stock’s flavor.

Two major styles are common: nam sai, with a clear broth, and nam khon, a creamier version finished with coconut milk or evaporated milk. Mushrooms, tomato, shallot, cilantro, and roasted chili paste may also appear.

Tom yum should not be confused with tom kha kai, a coconut-based chicken soup in which galangal and coconut milk play a more central role. “Tom Yam” is an accepted alternate spelling, but Tom Yum Goong is the precise answer for the shrimp version asked about.