Tiffany & Co. (NYSE: TIF) (known colloquially as Tiffany or Tiffany's) is a luxury American multinational jewelry and silverware corporation. Tiffany sells jewelry, sterling silver, china, crystal, stationery, fragrances, personal accessories, as well as some leather goods. Many of these goods are sold under the Tiffany name at Tiffany stores and through direct-mail and corporate merchandising. Goods are also sold wholesale to third-party distributors. Tiffany is renowned for its luxury goods, especially for its diamonds, diamond jewelry, and especially its diamond engagement rings; Tiffany markets itself as an arbiter of taste and style.

Founded by Charles Lewis Tiffany and Teddy Young in New York City in 1837 as a "stationery and fancy goods emporium," the store initially sold a wide variety of stationery items, and operated as Tiffany, Young and Ellis in lower Manhattan. The name was shortened to Tiffany & Co. in 1853 when Charles Tiffany took control, and the firm's emphasis on jewelry was established. Tiffany & Co. has since opened stores in major cities all over the world. Unlike other stores at the time in the 1830s, Tiffany clearly marked the prices on its goods, as there would be no haggling for the price. In addition, against the social norm at the time, Tiffany only accepted only cash payments, and did not accept payments on credit.