Dirk Janssen (11 July 1881 – 22 November 1986) was a Dutch gymnast who competed in the 1908 Summer Olympics.

[1][2] Born in Groningen, Janssen was part of the Dutch gymnastics team, which finished seventh in the team event.

In the individual all-around competition he finished 69th.

[3] He was the younger brother of Jan Janssen.

This biographical article related to Dutch artistic gymnastics is a stub.