Bianca Cogel-Dittrich (born 3 January 1967) is a retired German rhythmic gymnast who represented East Germany.

Bianca made her debut in 1980, when she won bronze in the All-Around, with hoop and with clubs, silver with ribbon and gold with rope at the East German Championships.

[2][3] In 1981 she tied with Petra Loucky for the national All-Around title, also winning gold with hoop and silver with rope and ribbon; the same year she took part in the World Championships in Munich taking 19th place overall.

[7] In 1985 she was selected for the World Championships in Valladolid, she was 5th in the All-Around and with rope, 6th with clubs and 8th with ribbon and won bronze in the ball final.

[8] At the GDR Championships she was the overall runner-up, achieving the same results with rope, clubs and ribbon, and winning gold with ball.