The Queen Alexandra Stakes is a class 2 conditions race for horses aged 4 years old and above, run over 2 miles 5 furlongs and 159 yards during the Royal Ascot meeting.

The race named in honour of Queen Alexandra, Queen Consort of King Edward VII. It was originally titled the Alexandra Stakes and was given its present name in 1931.

It is traditionally the last race of the Royal Ascot meeting and is the longest flat race run in the United Kingdom. Until 2004 it was run over a distance of 2 miles 6 furlongs and 34 yards. When the Royal Ascot meeting was staged at York Racecourse in 2005 the race was run over 2 miles 6 furlongs and on its return to Ascot in 2006 the course re-alignment had reduced the distance to 2 miles 5 furlongs and 159 yards.