The Toyota iQ is a city car manufactured by Toyota and marketed in a single generation for Japan (2008–2016); Europe (2008–2015); and North America (2012–2015), where it was marketed as the Scion iQ. A rebadged variant was marketed in Europe as the Aston Martin Cygnet (2011–2013).

The A-segment is the first category in the passenger car classification system defined by the European Commission. It is used for city cars, the smallest category of passenger cars defined.