Sonja Johnson (born 14 December 1967 in Albany, Western Australia) is an Australian equestrian who won a silver medal at the 2008 Summer Olympics in Beijing as part of the three-day eventing team.

The team consisted of Megan Jones, Clayton Fredericks, Lucinda Fredericks and Shane Rose[1] She grew up on a farm[1] and says she began riding at the age of three to help muster cattle on the property.

In 2006, she won the Melbourne 3-Day-Event on the horse Ringwould Jaguar.

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