Porsche, properly pronounced as a two syllable word, is a German manufacturer of sports cars, founded in 1931 by Ferdinand Porsche, the engineer who created the first Volkswagen. The company is located in Zuffenhausen, a city district of Stuttgart.

Porsche has a reputation for producing high-end sports vehicles that, despite their high performance, are reliable and tractable enough to be used for daily driving, and of high manufacturing quality and durability. The current Porsche lineup includes everything from an entry-level roadster (Boxster) to a Supercar (Carrera GT). Future plans include a high performance luxury sedan.

As a company, Porsche is known for weathering changing market conditions with great financial stability, while retaining most production in Germany during an age when most other German car manufacturers have moved at least partly to Eastern Europe or overseas. The headquarters and main factory are still at Stuttgart-Zuffenhausen, but for the Cayenne and Carrera GT there is a new plant at Leipzig, in the east of Germany. Some Boxster and Cayman production is outsourced to Valmet Automotive in Finland. The company has been highly successful in recent times, and indeed claims to be the most profitable car company in the world (presumably in terms of profit margin, as its absolute profits would likely be dwarfed by Toyota).

Porsche has for many years offered consultancy services to various other car manufacturers. Studebaker, SEAT, Daewoo, Subaru and Yugo have consulted Porsche on engineering for their cars or engines. Porsche also helped Harley-Davidson design their new engine in their newer V-Rod motorcycle.

Porsche's main competition is arguably from Italian specialty automaker Ferrari, though traditionally their vehicles appeal to quite different personalities, if similar demographics. Other rivals include coupes from Jaguar, BMW, Maserati, Aston Martin and arguably Mercedes-Benz.