Velsen is a municipality in the Netherlands, in the province of North Holland. It is located on both sides of the North Sea Canal.
On the north side of the North Sea Canal there is a major steel plant, Tata Steel IJmuiden, formerly known as Koninklijke Hoogovens. The headquarters of the Koninklijke Nederlandse Redding Maatschappij is located in IJmuiden.
The Kennemerstrand beach on the south side of the canal is at the end of the Kennemerboulevard, which runs south of the Seaport Marina.
To the south is the beach of Bloemendaal aan Zee. In between is a nude beach.