The Somerville Tattersall Stakes, currently run as the Tattersalls Stakes, is a Group 3 flat horse race in Great Britain open to two-year-old colts and geldings.
It is run on the Rowley Mile at Newmarket over a distance of 7 furlongs (1,408 metres), and it is scheduled to take place each year in late September.
The race was formerly classed at Listed level, and it used to be open to horses of either gender.
The Somerville Tattersall Stakes is currently held on the opening day of Newmarket's three-day Cambridgeshire Meeting.
The leading contenders sometimes go on to compete in the Dewhurst Stakes or the Racing Post Trophy.