Nicky is a diminutive form of the name Nicholas, occasionally used as a given name in its own right. It may refer to:
In sports:
- Nicky Adams (born 1986), English-born Welsh footballer
- Nicky Boje (born 1973), South African cricketer
- Nicky Butt (born 1975), English former footballer
- Nicky Forster (born 1973), English football manager and former player
- Nicky Grist (born 1961), Welsh former rally co-driver
- Nicky Hayden (born 1981), American motorcycle racer
- Nicky Law (footballer born 1961), English football manager and former player
- Nicky Law (footballer born 1988), English midfielder; son of the above
- Nicky Little (born 1976), New Zealand rugby union footballer
- Nicky Maynard (born 1986), English footballer
- Nicky Rackard (1922-1976), Irish hurler
- Nicky Robinson (rugby union) (born 1982), Welsh rugby union footballer
- Nicky Shorey (born 1981), English footballer
- Nicky Summerbee (born 1971), English former footballer
- Nicky Weaver (born 1979), English football goalkeeper
- Nicky Winmar (born 1965), former Australian rules footballer
- Dolph Ziggler (born 1980), professional wrestler with Nicky as one of his ring names
In music:
- Nicky Byrne (born 1978), singer and member of Irish pop group Westlife
- Nicky Chinn (born 1945), British songwriter and record producer
- Nicky Hopkins (1944-1994), English pianist and organist
- Nicky Jam, stage name of reggaeton artist Nick Rivera Caminero (born 1980)
- Nicky Mehta, Canadian singer and songwriter
- Nicky Wire (born 1969), Welsh lyricist, bassist and occasional vocalist
In other fields:
- Tsar Nicholas II of Russia, called "Nicky" by Kaiser Wilhelm II and King George V
- Nicky Hilton (born 1983), American socialite, heiress and fashion designer, sister of Paris Hilton
- Conrad Hilton, Jr. (1926-1969), American socialite and businessman; grand-uncle of Nicky Hilton
- Nicky Gavron, British politician, Deputy Mayor of London, and a member of the London Assembly
- Nicky Gumbel, Anglican priest and author
- Nicky Cruz (born 1938), Christian evangelist and former gang leader
- Nicky Henson (born 1945), English actor
- Nicky Katt (born 1970), American actor
Fictional characters:
- Nicky, hero of the film Little Nicky, played by Adam Sandler
- Nicky, in the Broadway musical Avenue Q
- Nick Tilsley, originally called Nicky, in the soap opera Coronation Street