| Honorific Prefix: | Lieutenant general |
| Willem van Rijn | |
| Office: | Chairman of the United Defence Staff of the Armed Forces of the Netherlands |
| Term Start: | 15 January 1972 |
| Term End: | 1 November 1973 |
| Predecessor: | Lieutenant admiral Hugo van den Wall Bake |
| Successor: | General Robbie Wijting |
| Birth Date: | 29 December 1915 |
| Birth Place: | Scheveningen, Netherlands |
| Death Place: | The Hague, Netherlands |
| Allegiance: |  Netherlands |
| Serviceyears: | 1939-1973 |
| Rank: | Lieutenant general |
| Battles: | World War II |
Lieutenant general Willem van Rijn (29 December 1915 – 20 October 1997) was a Dutch military officer who served as Chairman of the United Defence Staff of the Armed Forces of the Netherlands between 1972 and 1973. [1]