Agnes Morgenthau was born in Chicago, Illinois in 1892. She graduated from Smith College in 1914 and attended Columbia University, 1914-15. In 1918, she married Sidney Newborg. They had three children. Agnes had several long-time interests, among them The Woman's City Club, of which she was a charter member, and the Goddard-Riverside Community Center, an interracial camp and settlement house. She died on April 28, 1972.