Sybille Bammer (born 27 April 1980 in Linz, Austria) is a professional female tennis player from Austria. Her career high ranking is No. 19, achieved on 17 December 2007.
She is one of three mothers on the WTA Tour (Kim Clijsters and Rossana de los Ríos are the others), having taken time off at age 21 to have her daughter Tina before returning to the tour. When she won the 2007 Pattaya Women's Open, it was the first time in eighteen years that a mother won on tour, after Laura Arraya in 1989. Her daughter Tina is a frequent regular in the crowd. Bammer said of her daughter, "She is always telling other people to be quiet because Mummy is concentrating."
Bammer made her WTA Tour main draw debut as a wildcard in 2000 at the Klagenfurt event. She lost to German player Andrea Glass at this event. She failed to qualify for Wimbledon, US Open and her home tournament in Linz.