Tiffany & Co. (known colloquially as Tiffany or Tiffany's) is an American luxury jewelry and specialty retailer headquartered in New York City. It sells jewelry, sterling silver, china, crystal, stationery, fragrances, water bottles, watches, personal accessories, and leather goods. The company was founded in 1837 by the jeweler Charles Lewis Tiffany and became famous in the early 20th century under the artistic direction of his son Louis Comfort Tiffany.

Tiffany is known for its luxury goods, particularly its diamond and sterling silver jewelry. It markets itself as an arbiter of taste and style. These goods are sold at Tiffany stores, and through direct-mail and corporate merchandising.

The company operates retail outlets in the Americas, Asia-Pacific, Japan, Europe and the United Arab Emirates. In 2018, Tiffany had 93 stores in the US and 321 stores worldwide; net sales totaled US $4.44 billion