The Toyota Allion is a compact sedan sold in Japan by Toyota.

The name is created based on the phrase "all-in-one".

Launched December 25, 2001, it replaced the Toyota Carina, a model that first appeared in 1970. The Allion has a emphasis towards younger buyers in comparison to the Toyota Premio sedan, which has a more elegant approach, and both were launched at the same time. The Premio and the Allion share the same engines and interior. The Allion can be customized with front spoilers and rear mounted trunk wings, as well as ground effect body parts to enhance the vehicles appearance specially designed and sold by Toyota. The Allion continues the Toyota tradition by being made for taxi usage, driving school and law enforcement versions.

December 20, 2004, the Allion received a modest restyle with the introduction of LED taillights.

The second generation was introduced June 4, 2007, with Toyota continuing to offer appearance modifications at local dealerships, with AWD being offered on vehicles equipped with the 2ZR-FE 1.8 L direct injection engine.