Sem Steijn (born 12 November 2001) is a Dutch professional footballer who plays as an attacking midfielder for Eredivisie club Twente.

Steijn is a youth product of SV KMD and ADO Den Haag.

[1] On 27 July 2018, he signed his first professional contract with ADO Den Haag, and was subsequently loaned to VVV-Venlo.

[2] He made his professional debut for VVV in a 4–1 Eredivisie loss to Feyenoord on 6 December 2018.

This biographical article related to association football in the Netherlands, about a midfielder, is a stub.