The Volvo S40 is a series of subcompact executive cars marketed and produced by the Swedish manufacturer Volvo Cars from 1995 to 2012, offered as a more mainstream alternative to the compact executive Volvo S60 to compete in a lower pricing bracket. The S40 was more or less positioned against premium-leaning small family cars like the Volkswagen Jetta as well as some mass-market large family cars.

A compact executive car, also known as a compact luxury car, is a premium car larger than a premium compact and smaller than an executive car. Compact executive car is a UK term and a part of the D-segment in the European car classification.