The country that experienced the Wall Street Crash of 1929 was the United States.
The crash centered on U.S. financial markets, especially the New York Stock Exchange in New York City. After share prices reached unsustainable levels in the late 1920s, widespread selling accelerated in October 1929.
The economic consequences spread far beyond the United States. International lending contracted, global trade weakened, and banks and businesses in many countries suffered. These international effects helped turn a U.S. market collapse into a worldwide economic crisis known as the Great Depression.
The United States is sometimes confused with Britain in discussions of the period because London was also a major financial center and British markets were affected. The defining Wall Street event, however, was an American crash centered in New York.