Thomas Babbage and his winning design.
Thomas Babbage, a 30-year-old English teacher from Shipston-on-Stour, came up with the design that features on the equestrian coin.
The coins will be put into general circulation from November.
The 50p coins will also be available specially packaged for those wanting a mint collection.
The public contest to design the coins began in January 2009 and attracted 30,000 entries.
It is the first time the public has had such input into currency design.
Royal Mint spokesman Dave Knight said: "Every one of our 29 winners is making history. Their coins will become treasured mementos of the biggest sporting event to happen on UK shores in a generation, and will be around for generations to come."