William, Will, Willy, Bill, or Billy Rice may refer to:
Arts and entertainment William S. Rice (1873–1963), American woodblock print artist and art educator William "Bill" Rice (1931–2006), American artist, writer, actor, and director William Rice (food journalist) (1938–2016), American food journalist Bill Rice (1939–2023), American songwriter
Business and industry William Rice (1788) (1788–1863), American merchant and public servant William Marsh Rice (1816–1900), American businessman, founder of Rice University William B. Rice (1840–1909), American industrialist from Massachusetts W. Thomas Rice (1912–2006), American railroad tycoon
Law and politics William Rice (MP) (died 1588), English politician William W. Rice (1826–1896), American statesman, representative from Massachusetts William Hyde Rice (1846–1924), Hawaiian-American businessman and politician William Gorham Rice (1856–1945), American state and federal government official William Chauncey Rice (1878–1941), American lawyer
Religion William Harrison Rice (1813–1862), American missionary teacher in Hawaii William Rice (librarian) (1821–1897), American minister and librarian William A. Rice (1891–1946), American-born Catholic bishop in Belize Willy Rice, American pastor and president of the Southern Baptist Convention
Others William North Rice (1845–1928), American geologist William Rice (rower) (1881–1941), American-Canadian rower Billy Rice (1938–2008), Irish footballer William Craig Rice (1955–2016), American pedagogy expert
Other uses Will Rice College, residential college at Rice University, Houston, Texas, U.S.