Bastiaan Tamminga (born June 9, 1981) is a former Dutch swimmer who specializes in the 50 m events of the backstroke, butterfly and freestyle.

He trained by former world champion Marcel Wouda alongside olympic champions Maarten van der Weijden and Hinkelien Schreuder.

Tamminga made his international debut at the European SC Championships 2001 in Antwerp.

At the European SC Championships 2007 in Debrecen, Hungary he won his only international medal, a bronze, in the 4×50 m medley relay alongside Nick Driebergen, Robin van Aggele and Mitja Zastrow.

In April he competed in the 2008 FINA Short Course World Championships and finished 10th in the 50 m butterfly, breaking the national record, and 21st in the 100 m. In the 4×100 m medley relay he swam a national record together with Robin van Aggele, Joeri Verlinden and Mitja Zastrow, finishing 8th in the final.