Uncle Ben's is a brand name for parboiled rice and other related food products. The brand was introduced by Converted Rice Inc., which was later bought by Mars, Inc. It is based in Houston, Texas. Uncle Ben’s rice was first marketed in 1943 and was the top-selling rice in the United States from 1950 until the 1990s.

In the 1930s, the German-British scientist and chemist Erich Huzenlaub (1888–1964) invented a form of parboiling designed to retain more of the nutrients in rice, now known as the Huzenlaub Process. The process consisted first in vacuum drying the whole grain, then steaming, and finally vacuum drying and husking.Besides increasing rice's nutritional value, it also made it resistant to weevils and reduced cooking time.In 1932, Forrest Mars, Sr., moved to the United Kingdom with the goal of growing the Mars food company internationally.While in the United Kingdom, Mars learned of Erich Huzenlaub's work with rice. Huzenlaub's London based company was called "Rice Conversion, Ltd."The two eventually formed "Mars and Huzenlaub" in Houston, Texas, which gave Forrest Mars partial ownership of the "Huzenlaub Process" rice conversion patent. In 1942, through Mars's guidance and sponsorship, Huzenlaub created "Rice Conversion, Inc." with a Houston food broker, Gordon L. Harwell, forming Converted Rice, Inc., which sold its entire output to the U.S. and British Armed Forces. The advantage of this product was that it could be air-dropped to troops in the field without risk of weevil infestation, and it could be cooked more quickly than other rice products. Additionally, the converted rice product would retain more nutritional value.In 1944, with additional financing from the Defense Plant Corporation and an investment by Forrest Mars, it built a second large plant.In 1959, Forrest Mars purchased Erich Huzenlaub's interest in the company and merged it into his Food Manufacturers, Inc..

Uncle Ben’s products carry the image of an elderly African-American man dressed in a bow tie, said to have been the visage of a Chicago maître d’hôtel named Frank Brown. According to Mars, Uncle Ben was an African-American rice grower known for the quality of his rice. Gordon L. Harwell, an entrepreneur who had supplied rice to the armed forces in World War II, chose the name Uncle Ben’s as a means to expand his marketing efforts to the general public. "Uncle" was a common appellation used in the Southern United States to refer to older male Black slaves or servants.