Nicky Hilton (born October 5, 1983) is an American heiress of the Hilton Hotel chain.

She was born Nicholae Olivia Hilton, the second of four children born to real estate mogul Richard Hilton and former actress Kathy Richards. Her sister and brothers are Paris Whitney Hilton, Barron Nicholas Hilton and Conrad Hughes Hilton.

Her paternal grandparents are Barron Hilton and Marilyn Hawley. He was the second child of Hilton Hotel chain founder Conrad Hilton and Mary Barron. Her granduncles are Conrad "Nicky" Hilton and Eric Hilton, and her grandaunt is Francesca Hilton, whose mother is Zsa Zsa Gabor. The family worth of Barron Hilton and his descendants is estimated at over $335,000,000.

As her first name is similar to the middle name of her granduncle, Conrad Nicholson Hilton, Jr., who was called "Nicky," her nickname is the same as his.

Hilton and her sister, Paris, are known for their jet-set lifestyles, though Nicky has kept a lower profile.

On August 15, 2004, Nicky Hilton married Todd Andrew Meister, a tycoon worth $100,000,000, at a Las Vegas Wedding Chapel and annulled shortly after.