Saint George is the patron saint of England. He's popularly identified with England and English ideals of honour
The story of St. George and the Dragon dates back to the Middle Ages when the dragon was commonly used to represent evil, so it's a wonderful tale of good triumphing over evil.
Since then St. George has been popularly identified with English ideals of charity, chivalry and courage (now known as the 3 C's)
He's also patron saint of soldiers, archers, cavalry and chivalry, farmers and field workers, riders and saddlers, and he helps those suffering from leprosy and plague. In recent years he has been adopted as patron saint of Scouts.