| Willem Janssen | |
| Birth Date: | 11 June 1880 |
| Birth Place: | Lonneker |
| Nationalyears1: | 1907 |
| Nationalteam1: | Netherlands |
| Nationalcaps1: | 3 |
| Nationalgoals1: | 0 |
Willem Gerhard Janssen (11 June 1880 – 8 September 1976) was a Dutch footballer. He was part of the Netherlands national football team, playing 3 matches. He played his first match on 1 April 1907.[1]