The 1966–67 Nationalliga A season was the 29th season of the Nationalliga A, the top level of ice hockey in Switzerland. 10 teams participated in the league, and EHC Kloten won the championship.
First round
| Pl. | Team | GP | W | T | L | GF–GA | Pts |
|---|---|---|---|---|---|---|---|
| 1. | HC Servette Genève | 18 | 13 | 1 | 4 | 106:49 | 27 |
| 2. | EHC Visp | 18 | 11 | 2 | 5 | 73:62 | 24 |
| 3. | HC La Chaux-de-Fonds | 18 | 10 | 3 | 5 | 73:44 | 23 |
| 4. | EHC Kloten | 18 | 10 | 2 | 6 | 79:54 | 22 |
| 5. | SC Langnau | 18 | 8 | 4 | 6 | 75:65 | 20 |
| 6. | HC Davos | 18 | 10 | 0 | 8 | 71:63 | 20 |
| 7. | Zürcher SC | 18 | 8 | 4 | 6 | 71:82 | 20 |
| 8. | Grasshopper-Club | 18 | 5 | 3 | 10 | 57:67 | 13 |
| 9. | SC Bern | 18 | 3 | 1 | 14 | 32:72 | 7 |
| 10. | Young Sprinters Neuchâtel | 18 | 2 | 0 | 16 | 44:123 | 4 |
Final round
| Pl. | Team | GP | W | T | L | GF–GA | Pts |
|---|---|---|---|---|---|---|---|
| 1. | EHC Kloten | 6 | 4 | 1 | 1 | 30:19 | 9 |
| 2. | HC Servette Genève | 6 | 3 | 1 | 2 | 22:16 | 7 |
| 3. | HC La Chaux-de-Fonds | 6 | 2 | 2 | 2 | 18:16 | 6 |
| 4. | SC Langnau | 6 | 2 | 2 | 2 | 18:16 | 6 |
| 5. | HC Davos | 6 | 2 | 1 | 3 | 29:25 | 5 |
| 6. | Zürcher SC | 6 | 2 | 1 | 3 | 21:38 | 5 |
| 7. | EHC Visp | 6 | 1 | 2 | 3 | 13:21 | 4 |
Relegation
| Pl. | Team | GP | W | T | L | GF–GA | Pts |
|---|---|---|---|---|---|---|---|
| 1. | Grasshopper-Club | 6 | 5 | 0 | 1 | 27:16 | 10 |
| 2. | HC Sierre | 6 | 4 | 1 | 1 | 29:18 | 9 |
| 3. | Young Sprinters Neuchâtel | 5 | 3 | 1 | 1 | 26:17 | 7 |
| 4. | HC Ambrì-Piotta | 5 | 3 | 0 | 2 | 25:17 | 6 |
| 5. | HC Sion | 6 | 3 | 0 | 3 | 26:33 | 6 |
| 6. | SC Bern | 6 | 1 | 0 | 5 | 16:24 | 2 |
| 7. | SC Küsnacht | 6 | 0 | 0 | 6 | 13:37 | 0 |