| Walter Diggelmann | |
| Fullname: | Walter Diggelmann |
| Birth Date: | 1915 8, df=y |
| Birth Place: | Zürich, Switzerland |
| Death Place: | Guntalingen, Switzerland |
| Discipline: | Road |
| Role: | Rider |
| Majorwins: | Züri-Metzgete (1941) 1 stage 1952 Tour de France |
Walter Diggelmann (Zürich, 11 August 1915 – Guntalingen, 5 March 1999) was a Swiss professional road bicycle racer. Diggelmann won one stage in the 1952 Tour de France.