Alf-Gerd Deckert (born 4 July 1955) is a retired cross-country skier from East Germany. He competed at the 1980 Winter Olympics in the 15:km, 30:km and 50:km events and finished in 37th, 9th and 26th place, respectively.

He was married to Petra Thümer, a German Olympic swimmer. His brother Manfred is a retired Olympic ski jumper.

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