Sonja Wiedemann (born 8 September 1977) is a German luger who competed from 1999 to 2005.

She won two medals in the women's singles at the FIL World Luge Championships with a gold in 1999 and a bronze in 2000.

Wiedemann also won a silver medal in the mixed team event at the 2000 FIL European Luge Championships in Winterberg, Germany.

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