The announcement came as part of the IOC's systematic review of the sports programme.
Other changes include a new run and shoot format for Modern Pentathlon and the increase in the number of women competing in Wrestling. In Canoeing, the Men's C2 500m event has been replaced by the Women's K1 200m.
The changes reflect the IOC’s desire to continually refresh the Olympic programme and its commitment to increase participation by women.
Seb Coe, Chair of the London 2012 Organising Committee, said: 'Today's decision is an important landmark in the evolution of women's sport at the Olympic Games.
'When London last held the Games in 1948 women participated in Canoe Kayak for the first time. In 1952 women competed for the first time in Equestrian Jumping and Dressage, in 1964 800m Track and Field, in 1976 Rowing and in 1984 a long overdue decision was made to allow women to compete in the Marathon.
'As recently as 1992 women competed in Judo for the first time, and at the Sydney Games in 2000 women competed for the first time in Weightlifting.
'I am delighted that London 2012 will take its place in the Olympic tradition of advancing women in sport.'
The changes will be incorporated into planning and do not present any major challenge to the London 2012 Organising Committee.