Willemijn Bos (born 2 May 1988) is a Dutch field hockey defender.
In 2011, she was included to the All-Star team by the International Hockey Federation.
She was to selected for the 2012 Summer Olympics but tore her anterior cruciate ligament during a friendly against the United States three days before the Games and had to withdraw.
She returned to competitions in March 2013, and won a silver medal at the 2016 Rio Olympics.Bos took up hockey aged six.
She has a degree in law from the University of Utrecht.