Denys is both a given name and a surname. Notable people with the name include:
Given name:
Denys Andriyenko (born 1980), Ukrainian footballer
Denys Arcand (born 1941), Canadian film director, screenwriter and producer
Denys Baptiste (born 1969), jazz musician
Denys Bouliane (born 1955), Canadian composer and conductor
Denys Bullard (1912–1994), British farmer and politician
Denys Cazet (born 1938), French-American author
Denys Cochin (1851–1922), French writer
Denys Coop (1920–1981), British cinematographer
Denys Corbet (1826–1909), Channel Islands poet and painter
Denys Corbett Wilson (1882–1915), pioneer aviator
Denys Cowan (born 1961), African American comic book artist and television producer
Denys de La Patellière (born 1921), French film director and scriptwriter
Denys Defrancesco (DDF Productions), French adult photographer
Denys Desjardins (born 1966), film director, screenwriter, cinematographer and teacher
Denys Finch Hatton (1887–1931), big-game hunter
Denys Fisher (1918–2002), board game designer
Denys Golaydo (born 1984), Ukrainian football midfielder
Denys Hay (1915–1994), Scottish historian
Denys Henderson (born 1932), Scottish solicitor
Denys Hill (1896–1971), English cricketer
Denys Johnson-Davies (born 1922), Arabic-to-English translator
Denys Lasdun (1914–2001), English architect
Denys Morkel (1906–1980), South African cricketer
Denys Puech (1854–1942), French sculptor
Denys R. Martin (1892–1970), Royal Engineers officer
Denys Rayner (1908–1967), Royal Navy officer
Denys Roberts (born 1923), Colonial Secretary of Hong Kong
Denys Smith (1924-2016), British racehorse trainer
Denys Spittle (1920–2003), British architect
Denys Sylantyev (born 1976), Ukrainian swimmer
Denys Turner (born 1942), British academic
Denys Val Baker (1917–1984), Cornish writer
Denys Watkins-Pitchford (1905–1990), British author, illustrator and countryman
Denys Whitehorn Reid (1897–1970), officer in the British Army
Denys Wilkinson (born 1922), British nuclear physicist
Denys Yurchenko (born 1978), Ukrainian pole vaulter
Leone Sextus Denys Oswolf Fraudatifilius Tollemache-Tollemache de Orellana Plantagenet Tollemache-Tollemache (1884–1917), officer in the British Army
Pierre Denys de Montfort (1766–1820), French naturalist
Surname:
André Denys (1948–2013), Belgian politician
Ewout Denys (born 1987), Belgian professional football player
Frans Denys (c. 1610 – 1670), a Flemish Baroque painter.
Jacob Denys (1644–1708), a Flemish Baroque painter.
Jean-Baptiste Denys (c. 1640–1704), French physician
Nicolas Denys (c. 1598–1688), French explorer, colonizer, soldier and leader
Pierre Denys, French physician, discovered Denys-Drash syndrome
Sir Thomas Denys (c.1477-1561), Sheriff and MP for Devon