Denis is a masculine given name. Notable people with the name include:
Denis Diderot, French philosopher and co-founder of the Encyclopédie
Denis Glushakov, Russian footballer
Denis Grachev (fighter), Russian boxer, kickboxer and mixed martial artist
Denis Grachev (badminton), Russian badminton player
Denis Hayes, environmentalist and Earth Day founder
Denis Healey (born 1917), British politician
Denis Irwin, former Manchester United defender
Denis King, British composer
Denis Kolodin, Russian footballer
Denis Laktionov, Russian footballer
Denis Law, former Manchester United centre-forward
Denis Leary, American actor and comedian
Denis Lebedev, Russian boxer
Denis Lebrun, comic artist (Blondie strip)
Denis Marconato, Italian basketball player
Denis McDonough, American politician, appointed President Obama's second-term Chief of Staff
Denis Perera (1930-2013), 8th Commander of the Sri Lanka Army
Denis Shapovalov (born 1999), Canadian tennis player
Denis Smith, English cricketer
Denis Stracqualursi, Argentine footballer
Denis Tahirović (born 1985), Croatian footballer
Denis Thatcher (1915–2003), British businessman, husband of former British Prime Minister Margaret Thatcher
Denis Zvizdić (born 1964), Bosnia and Herzegovina politician, Chairman of the Council of Ministers
