Marshall Field was an American entrepreneur who had an estimated net worth of $66 billion.

Marshall Field began his career by working at a leading dry goods merchant Cooley, Wadsworth and Company. He then purchased a partnership with the reorganized firm of Farwell, Field & Company.

In 1865, he collaborated with Levi Leiter to establish Field, Leiter & Company. In 1881, he changed the store's name to Marshall Field and Company.

The quotes "Give the lady what she wants" and "The customer is always right" are attributed to Field. He also made Harry Selfridge a junior partner in the company and responsible for advertising.

Marshall Field was born on August 18, 1834 in Conway, Massachusetts, USA. He is married to Delia Spencer and has two children from his previous marriage to Nannie Douglas Scott. He died on January 16, 1906 due to pneumonia.