Smart (stylized in lowercase) is a German automotive marque established in 1994. Smart Automobile Co., Ltd. is a joint venture established by Mercedes-Benz AG and Zhejiang Geely Holding Group in 2019 and aimed at producing Smart-badged cars in China to be marketed globally. The venture is headquartered in Ningbo.

Originally, Smart was known for producing microcars and subcompacts, primarily the Fortwo and Forfour, at Smartville in Hambach, Moselle, France and additionally at Renault's Revoz plant (Novo Mesto, Slovenia). Since its restructuring in 2019, the brand now produces small battery electric vehicles at a manufacturing plant in China, with distribution, marketing and aftersales activities in Europe handled by Smart Europe GmbH, which is headquartered in Stuttgart, Germany

The marque was founded in 1994 by Micro Compact Car AG (MCC), a joint venture between SMH and Daimler-Benz. MCC became a wholly owned subsidiary of Daimler-Benz in 1998, and was subsequently renamed MCC smart GmbH, then smart GmbH. smart GmbH was then absorbed by DaimlerChrysler (later Daimler AG) in 2006, making smart a marque within the Mercedes-Benz Cars division.

The name Smart derives from the cooperation of the Swiss company Swatch with Mercedes-Benz: "Swatch Mercedes ART".

The design concept for the marque's automobiles began at Mercedes-Benz in the early 1970s to late 1980s. After brief backing by Volkswagen, the first model was released by Daimler-Benz in October 1998. Several variants on the original design have been introduced, with the original being the "City Coupé" that would be renamed the "ForTwo".

In late 1982, SMH (makers of the Swatch brand of watches) CEO Nicolas Hayek began developing an idea for a new car using the same type of manufacturing strategies and personalization features used to popularize Swatch watches. He believed that the automotive industry had ignored a sector of potential customers who wanted a small and stylish compact city car. This idea soon became known as the "Swatchmobile". Hayek's private company Hayek Engineering AG began designing the new car for SMH, with seating for two and a hybrid drivetrain. The name Smart was coined by Manfred Gotta.

While design of the car was proceeding, Hayek feared existing manufacturers would feel threatened by the Swatchmobile. Thus, rather than directly competing, he preferred to cooperate with another company in the automotive industry. This would also relieve SMH of the cost burden in setting up a distribution network. Hayek approached several automotive manufacturers, and on 3 July 1991, he reached an agreement with Volkswagen to share development of the new project.

By 1993, Ferdinand Piëch had become CEO of Volkswagen, and he immediately sought to terminate the project with SMH. Volkswagen had already been working on their own "three-litre car": a car which would consume three litres of fuel per 100 kilometres of driving (the eventual Volkswagen Lupo 3L). Volkswagen's own concept was believed to be a better business proposition, featuring four seats and more cargo room.