The Opel Agila is a city car marketed under the German marque Opel from 2000 to 2014, as a rebadged variant of the Suzuki Wagon R+ and the Suzuki Splash. It has been marketed under the Vauxhall marque in the United Kingdom.

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.