Johan van Stratum (born 15 April 1982) is a Dutch bassist, currently playing live for German power metal band Blind Guardian and Ayreon.

He was the bassist of Stream of Passion, and one of the two founding members to stay in the band until it disbanded in 2016. He also played bass live for Ayreon and The Gentle Storm, VUUR. In July 2021 he was announced as the bass player of German power metal band Blind Guardian.