Host City: London, Great Britain
Venue(s): London Aquatics Centre, Olympic Park, Stratford, London
Date Started: August 1, 2012
Date Finished: August 1, 2012
The United States had won this event three of the four times it had been contested at the Olympics, but the 2008 champions were Australia. Australia had already beaten the US in London in the 4×100 relay and they led for most of the final, challenged mostly by France, but Allison Schmitt was the US anchor and came home in the fastest split of the event, 1:54.09, to bring the United States their fourth gold medal in the event. Australia held on for the silver medal and France won bronze, Canada just missing out in fourth place.