The Porsche 356 is a sports car that was first produced by Austrian company Porsche Konstruktionen GesmbH (1948–1949), and then by German company Dr. Ing. h. c. F. Porsche GmbH (1950–1965). It was Porsche’s first production automobile. Earlier cars designed by the Austrian company include Cisitalia Grand Prix race car, the Volkswagen Beetle, and Auto Union Grand Prix cars.

The 356 is a lightweight and nimble-handling, rear-engine, rear-wheel drive, two-door available both in hardtop coupé and open configurations. Engineering innovations continued during the years of manufacture, contributing to its motorsports success and popularity. Production started in 1948 at Gmünd, Austria, where Porsche built approximately 50 cars.

In 1950 the factory relocated to Zuffenhausen, Germany, and general production of the 356 continued until April 1965, well after the replacement model 911 made its September 1964 debut. Of the 76,000 originally produced, approximately half survive.

The original price in 1948 for the 356 coupe was US$3,750 (equivalent to $45,700 in 2022). The 356 cabriolet cost US$4,250 (equivalent to $51,800 in 2022).

Prior to World War II Porsche designed and built three Type 64 cars for a 1939 Berlin-to-Rome race that was cancelled. In 1948 the mid-engine, tubular chassis 356 prototype called „No. 1” was completed. This led to some debate as to the „first” Porsche automobile. Although the original Porsche 356 unit had a rear-mid engine placement, the rear-engined 356 is considered by Porsche to be its first production model.

The 356 was created by Ferdinand „Ferry” Porsche (son of Ferdinand Porsche, founder of the German company), who founded the Austrian company with his sister, Louise.

On 8 June 1948, the very first Porsche sports car, the 356, was built. The original had already been modified so many times and in so many different ways that it was impossible to restore it to its original condition, so a new one was painstakingly built, nowadays.

The 356 has always been popular with the motor press. In 2004, Sports Car International ranked the 356 C tenth on their list of top sports cars of the 1960s. It remains a highly regarded collector car, regularly bringing between US$20,000 and US$100,000 at auction.