The 1942–43 Nationalliga A season was the fifth season of the Nationalliga A, the top level of ice hockey in Switzerland. Seven teams participated in the league, and HC Davos won the championship.
Standings edit
| Pl. | Team | GP | W | T | L | GF–GA | Pts. |
|---|---|---|---|---|---|---|---|
| 1. | HC Davos | 6 | 5 | 1 | 0 | 40:3 | 11 |
| 2. | Zürcher SC | 6 | 5 | 0 | 1 | 28:9 | 10 |
| 3. | Montchoisi Lausanne | 6 | 2 | 3 | 1 | 16:16 | 7 |
| 4. | EHC Arosa | 6 | 1 | 3 | 2 | 9:12 | 5 |
| 5. | EHC Basel-Rotweiss | 6 | 1 | 3 | 2 | 10:21 | 5 |
| 6. | SC Bern | 6 | 1 | 2 | 3 | 8:30 | 4 |
| 7. | Grasshopper-Club | 6 | 0 | 0 | 6 | 8:28 | 0 |