Tiffany & Co. (colloquially known as 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. Tiffany is known for its luxury goods, particularly its diamond and sterling silver jewelry. These goods are sold at Tiffany stores, and through direct-mail and corporate merchandising.

Tiffany & Co. 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. In 2018 net sales totaled US$4.44 billion. In 2019 Tiffany operated 326 stores globally in countries such as the United States, Japan, and Canada, as well as Europe, the Latin America and Pacific Asia regions.LVMH purchased Tiffany & Co for $15.8 billion in January 2021.