Robert Gross may refer to:Robert A. Gross (historian), American historian Robert A. Gross (physicist) (1927–2018), American physicist and engineering scientist Robert Arthur Gross (1914–1983), American violinist and composer Robert E. Gross (businessman) (1897–1961), businessman in the field of aviation Robert Edward Gross (1905–1988), pioneering pediatric cardiothoracic surgeon Bob Gross, retired professional basketball player