John Willard "Bill" Marriott Jr. (born March 25, 1932) is an American billionaire businessman who is the executive chairman of Marriott International, of which he owns 11.28%.

Marriott was born in Washington, D.C., the son of Alice Marriott and J. Willard Marriott, the founder of Marriott Corporation. He attended St. Albans School in Washington, D.C. He is also an Eagle Scout and recipient of the Distinguished Eagle Scout Award.

In 1954, Marriott earned a BS in finance from the University of Utah, where he was a member of the Sigma Chi fraternity. There, he met his wife, the daughter of a professor.

Upon graduating, Marriott went to a Navy training school in Georgia. From June 1954 to 1956, he served on the USS Randolph aircraft carrier as a wardroom mess officer in the Navy Supply Corps.

In June 1955, Marriott was married at the Salt Lake Temple in Salt Lake City.

Marriott joined Marriott Corporation in 1956. He pushed his father, who was wary of taking on debt after experiencing the Great Depression, to expand from the restaurant business into the hotel business.

Marriott was elected executive vice president and member of the board of directors in January 1964, president of the company in November 1964, chief executive officer in 1972, and chairman of the board in 1985. He introduced the practice of revenue management to the hotel industry.

Effective March 31, 2012, Marriott assumed the role of executive chairman of the company and relinquished the role of chief executive officer to Arne Sorenson.