Charles Millard Pratt was an American oil industrialist, educator, and philanthropist. As the eldest son of industrialist Charles Pratt, in 1875 he began working at Charles Pratt and Company, soon becoming president.

Charles Pratt was an American businessman. Pratt was a pioneer of the U.S. petroleum industry, and he established his kerosene refinery Astral Oil Works in Brooklyn, New York. He then lived with his growing family in Clinton Hill, Brooklyn. He recruited Henry H. Rogers into his business, forming Charles Pratt and Company in 1867. Seven years later, Pratt and Rogers agreed to join John D. Rockefeller's Standard Oil.