| Swiss League Cup | |
| Year: | 1973 |
| Num Teams: | 16 |
| Defending Champions: | FC Basel |
| Winners: | Grasshopper Club Zürich |
| Second: | FC Winterthur |
| Matches: | 15 |
| Goals: | 47 |
| Prev Season: | 1972 |
| Next Season: | 1974–75 |
The 1973 Swiss League Cup was the second Swiss League Cup competition. It was played in summer 1973 as a pre-season tournament to the 1973–74 Swiss football season. It was won by Grasshopper Club Zürich who defeated FC Winterthur 5–4 on penalties after a 2–2 draw in the final.
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The final took place on 10 October 1973 at Letzigrund in Zürich.|}