Trương Thanh Hằng (born 1 May 1986 in Ho Chi Minh City) is a Vietnamese track and field athlete who specialises in middle-distance running events. She is the Vietnamese record holder over both 800 metres and 1500 metres.
She is one of Asia's foremost middle-distance runners, having been Asian champion over 800 m both indoors and outdoors. She was a double silver medallist for Vietnam at the 2010 Asian Games. She has also been highly successful at the Southeast Asian Games, where she has won gold medals on five occasions from 2005 to 2009.

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