Veronica Campbell-Brown, Natasha Morrison and 200 meters silver medallist Elaine Thompson ensured Fraser-Pryce had a good lead when she took the baton and the 100 meters champion stormed across the line in 41.07 seconds.
The United States finished second in 41.68 with the early pace of the Jamaicans giving anchor Allyson Felix, the 400 meters champion in Beijing, no chance of catching Fraser-Pryce.
Trinidad and Tobago won the bronze in a national record of 42.03 ahead of Britain, whose 42.10 was also the best time ever run by the nation's top women sprinters.
Only the 40.82 recorded by the Americans to win gold at the 2012 London Olympics was faster than Saturday's winning time.
(Reporting by Nick Mulvenney, editing by Ed Osmond)
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