Hillis is both a given name and a surname. Notable people with the name include:
Given name Hillis Hadjo (c. 1770–1818), a leader of the Red Stick rebellion of the Creek Indians. Hillis Layne (1918–2010), American third baseman in Major League Baseball J. Hillis Miller (1928–2021), American literary critic J. Hillis Miller, Sr. (1899–1953), the fourth President of the University of Florida Yda Hillis Addis (born 1857), American writer
Surname Ali Hillis (born 1978), American actress David Hillis (21st century), prominent American herpetologist and systematic biologist David Hillis, (1785–1845), American politician Danny Hillis (born 1956) is an American inventor, entrepreneur, and scientist Dick Hillis (1913–2005), American Protestant Christian missionary to China Elwood Hillis (1926–2023), American politician Ivory O. Hillis Jr. (born 1930), American politician Leo Hillis (1920–2007), Australian rules footballer Llewellya Hillis, Canadian-born American marine biologist Mack Hillis, Major League Baseball second baseman Margaret Hillis (1921–1998), American conductor Newell Dwight Hillis (1858–1929), American writer Norman Hillis (21st century), Northern Ireland politician Peyton Hillis (born 1986), American football fullback Rib Hillis (born 1971), American soap opera actor Rick Hillis, Canadian poet and short story writer Ron Hillis (born 1906), Australian rules footballer Stewart Hillis (1943−2014), Scottish physician who held a professorship W. Daniel Hillis (born 1956), American inventor, entrepreneur and author Wally Hillis (1938–2006), Australian rules footballer