The Chevrolet Impala is a full-sized automobile built for the Chevrolet division by General Motors. Ed Cole, Chevrolet's chief engineer in the late 1950s, defined the Impala as a "prestige car within the reach of the average American citizen."

From 1958 until 1965, the Impala was Chevrolet's most expensive full-size car. In 1965, Chevrolet introduced the more-expensive Caprice.

The Impala in the later 1960s was typically positioned just below the top luxury trim Chevrolet Caprice, but above the most economical models such as Biscayne or Bel Air, and most readily distinguished by a pair of 3 rather than 2 taillights at its rear. It vied against other full size cars such as the Ford Galaxie 500 and the Plymouth Fury.

One of General Motors and America's most successful auto nameplates, the Impala was often the best-selling automobile in years when full-sized cars dominated sales. The 1965 sales of over one million units still stands as a record. The current version is the 8th best-selling vehicle and 5th top-selling car in the United States, and has the distinction of being the top-selling American-nameplate sedan, according to Reuters Top 20 Best-selling Vehicles Scorecard for calendar year 2007.