| John Vilhelmsen | |
| Birth Date: | 12 October 1934 |
| Birth Place: | Copenhagen, Denmark |
| Sport: | Rowing |
John Vilhelmsen (also known as Wilhelmsen; 12 October 1934 – 17 June 2010) was a Danish coxswain. He competed at the 1952 Summer Olympics in Helsinki with the men's eight where they were eliminated in the semi-final repêchage.[1] [2] Vilhelmsen died on 17 June 2010, at the age of 75.[3]