The Lexus IS (XE20) is the second generation of the Lexus IS line of compact executive cars. Sold by Lexus since 2005, the line includes multiple V6 gasoline-powered models, in four-door sedan and two-door coupé convertible body styles. Additional sedan models also feature inline-four diesel powertrains, and an F marque version, the IS F, features a V8 engine. A pre-production car of the second generation IS model was first shown at the 2005 Geneva Auto Show, with the production version debuting at the 2005 New York Auto Show. The second generation was only available as a sedan until the two-door coupé convertible variants debuted in 2008.

The Lexus IS is a compact executive car sold by Lexus, a luxury division of Toyota, since 1998. The IS was originally sold under the Toyota Altezza nameplate in Japan from 1998. The IS was introduced as an entry-level sport model positioned below the ES in the Lexus lineup.