Smarties are dragée chocolate confectionery marketed by Swiss company Nestlé. They were first manufactured in 1937 by British company H.I. Rowntree & Company of York. Since 2007, Smarties have been produced in Hamburg in Germany.

Smarties are oblate spheroids with a minor axis of about 5 mm (0.2 in) and a major axis of about 12 mm (0.5 in). They come in eight colours: red, orange, yellow, green, blue, mauve, pink and brown, although the blue variety was temporarily replaced by a white variety in some countries, whilst an alternative natural colouring dye of the blue colour was being researched.

Smarties are sold in many regions around the world, but are not distributed (except via parallel import) in the United States, where the trademark name is held by the Smarties Candy Company, which manufactures its own hard tablet sweet under the trademark name Smarties.

Confectionery company Rowntree's of York, England, have been making "Chocolate Beans" since at least 1882. In 1937, they renamed the product "Smarties Chocolate Beans", soon shortening the name to just "Smarties". While the sweets had previously been sold loose, as part of a broader strategy to establish a prominent brand identity and after seeing success in selling other confections in cardboard tubes, Rowntree's began selling Smarties Chocolate Beans in the packaging. The product and this packaging were marketed to children after test marketing in Scotland. The packaging was valued for being easily repurposed into crafts, and the plastic caps were collected, each marked with a letter of the alphabet.

In February 2005, the Smarties tube was replaced with a hexagonal design. The rationale behind changing the design was, according to Nestlé, to make the brand "fresh and appealing" to youngsters; the new packaging is also lighter and more compact, and the lid (which is now a hinged piece of cardboard) has a card clip which holds the lid shut when it is folded over. The new lid still features a letter like the old plastic lids, but it is in the form of a "what [letter] is a [thing]?" question, the answer for which can be read when the lid is open, next to the hole giving access to the rest of the tube.

Smarties are no longer manufactured in York; in October 2007, production was moved to Germany, where a third of them were already made. Outside Europe, Nestlé's largest production facility for Smarties is in Toronto, Canada, where Nestlé has been manufacturing its products since 1918. The factory located at 72 Sterling Road in the Junction Triangle was originally built for Cowan Cocoa and Chocolate.

In 1998, Nestlé obtained a trademark for a tubular Smarties package. It later sued Master Foods in Denmark, which was marketing M&M minis in a similar package. The Supreme Court of Denmark ruled that a basic geometrical shape could not be trademarked and ordered the trademark to be removed from the trademark register.

In 2021, the parent company Nestlé transferred the production of Lentilky, which had been produced in Czechia since 1907, to German Hamburg, and the ingredients are also being harmonized with the Smarties product.