| Season: | 1974–75 |
| Competition: | Nationalliga A |
| Winners: | Zürich |
| Relegated: | Luzern Vevey-Sports |
| League Topscorer: | Ilija Katić (Zürich) 23 goals |
| Prevseason: | 1973–74 |
| Nextseason: | 1975–76 |
| Season: | 1974–75 |
| Competition: | Nationalliga B |
| Promoted: | Biel-Bienne La Chaux-de-Fonds |
| Relegated: | US Giubiasco Mendrisiostar |
| League Topscorer: | Heinz-Joachim Dries (La Chaux-de-Fonds) 24 goals |
| Prevseason: | 1973–74 |
| Nextseason: | 1975–76 |
The following is the summary of the Swiss National League in the 1974–75 football season, both Nationalliga A and Nationalliga B. This was the 78th season of top-tier and the 77th season of second-tier football in Switzerland.
The Swiss Football Association (ASF/SFV) had 28 member clubs at this time and these were devided into two divisions of 14 teams each. The teams played a double round-robin to decide their table positions. Two points were awarded for a win and one point was awarded for a draw. The top tier (NLA) was contested by the top 12 teams from the previous 1973–74 season and the two newly promoted teams Luzern and Vevey-Sports. The champions would qualify for the 1975–76 European Cup. The second and third placed teams were qualified for the 1975–76 UEFA Cup. The last two placed teams were relegated.
The second-tier (NLB) was contested by the two teams that had been relegated La Chaux-de-Fonds and Chiasso, the teams that had been in third to twelfth position last season and the two newly promoted teams FC Raron and US Giubiasco. The top two teams would be promoted and the last two teams relegated. Because at the top of the table three teams ended the NLB level on points, in second position, a promotion play-off was required. Further, because at the bottom of the table three teams finished level on points, in second last position, a relegation play-out was also required.[1]
The first round of the NLA was played on 17 August 1974. There was a winter break between 17 November and 15 March 1975. The season was completed on 14 June 1976.
| Rank | Player | Club | Goals | |
|---|---|---|---|---|
| 1 | Ilija Katić | FC Zurich | 23 | |
| 2 | Hans-Jörg Pfister | Servette | 17 | |
| Slobodan Santrač | Grasshopper Club | 17 | ||
| Hanspeter Schild | BSC Young Boys | 17 | ||
| 5 |  Franco Cucinotta | FC Sion | 14 | |
| 6 | Ottmar Hitzfeld | FC Basel | 13 | |
| 7 | Guy Mathez | Neuchâtel Xamax | 12 | |
| Peter Risi | FC Winterthur | 12 | ||
| 9 | Rosario Martinelli | FC Zurich | 11 | |
| Daniel Jeandupeux | FC Zurich | 11 | ||
| Anton Schaller | FC Luzern | 11 | ||
| Claudio Sulser | Vevey-Sports | 11 | ||
| 13 |  Ove Grahn | Grasshopper Club | 10 |
The first round of the NLB was played on 17 August 1974. There was a winter break between 17 November and 15 March 1975. The season was completed on 14 June 1976.
| Team | Town | Stadium | Capacity | |
|---|---|---|---|---|
| FC Aarau | Aarau | Stadion Brügglifeld | ||
| AC Bellinzona | Bellinzona | Stadio Comunale Bellinzona | ||
| FC Biel-Bienne | Biel/Bienne | Stadion Gurzelen | ||
| FC Chiasso | Chiasso | Stadio Comunale Riva IV | ||
| Étoile Carouge FC | Carouge | Stade de la Fontenette | ||
| FC Fribourg | Fribourg | Stade Universitaire | ||
| US Giubiasco[2] | Ticino | Campo Semine | ||
| FC Grenchen | Grenchen | Stadium Brühl | ||
| FC La Chaux-de-Fonds | La Chaux-de-Fonds | |||
| FC Martigny-Sports | Martigny | Stade d'Octodure | ||
| Mendrisiostar | Mendrisio | Centro Sportivo Comunale | ||
| FC Nordstern Basel | Basel | Rankhof | ||
| FC Raron[3] | Raron | Sportplatz Rhoneglut | ||
| FC Wettingen | Wettingen | Stadion Altenburg | ||
Because at the top of the table three teams ended the NLB level on points, in second position, a promotion play-off was required. These games took place on neutral grounds on 21, 25 and 28 June.
Because at the bottom of the table three teams finished level on points, in second last position, a relegation play-out was also required. These games took place on neutral grounds on 21, 25 and 28 June.
Raron-Wettingen was not played (Mendrisiostar withdrew)