The Champion Stakes is a Group 1 flat horse race in Great Britain open to thoroughbreds aged three years or older.

It is run at Ascot over a distance of 1 mile 1 furlong and 212 yards (2,004 metres), and it is scheduled to take place as part of British Champions Day each year in October.

The present system of race grading was introduced in 1971, and the Champion Stakes was classed at the highest level, Group 1.

The winner earned an automatic invitation to compete in the Breeders' Cup Turf.

With an increased prize fund of £1,300,000, the Champion Stakes was Britain's richest horse race in 2011.