Dorothea Lange was an American documentary photographer and photojournalist, best known for her Depression-era work for the Farm Security Administration (FSA). Lange's photographs influenced the development of documentary photography and humanized the consequences of the Great Depression.

Documentary photography usually refers to a popular form of photography used to chronicle events or environments both significant and relevant to history and historical events as well as everyday life. It is typically undertaken as professional photojournalism, or real life reportage, but it may also be an amateur, artistic, or academic pursuit.