| Competition: | 1. Liga |
| Season: | 1973–74 |
| Winners: | 1. Liga champions: FC Raron Group West: FC Bulle Group Cenral: FC Solothurn Group South and East: FC Gossau |
| Promoted: | FC Raron US Giubiasco |
| Relegated: | Group West: Urania Genève Sport FC Thun Group Central: FC Moutier FC Deitingen Group South and East: FC Rapid Lugano FC Rorschach |
| Matches: | 3 times 156 and 1 decider plus 9 play-offs |
| Prevseason: | 1972–73 |
| Nextseason: | 1974–75 |
The 1973–74 1. Liga was the 42nd season of this league since its creation in 1931. At this time, the 1. Liga was the third tier of the Swiss football league system and it was the highest level of amateur football.
There were 39 clubs in the 1. Liga. These were divided into three regional groups, each with 13 teams. Within each group, the teams would play a double round-robin to decide their league position. Two points were awarded for a win. The three group winners and the runners-up contested a play-off round to decide the two promotion slots. The last two placed teams in each group were directly relegated to the 2. Liga (fourth tier).
| Club | Canton | Stadium | Capacity |
|---|---|---|---|
| ASI Audax-Friul[1] | Neuchâtel | Pierre-à-Bot | |
| FC Bulle | Fribourg | Stade de Bouleyres | |
| FC Central Fribourg[2] | Fribourg | Guintzet | |
| FC Dürrenast[3] | Bern | Stadion Lachen | |
| FC Le Locle[4] | Neuchâtel | Installation sportive - Jeanneret | |
| FC Meyrin | Geneva | Stade des Arbères | |
| FC Monthey | Valais | Stade Philippe Pottier | |
| FC Raron[5] | Valais | Sportplatz Rhoneglut | |
| FC Sierre[6] | Valais | Complexe Ecossia | |
| FC Stade Nyonnais | Vaud | Stade de Colovray | |
| FC Thun | Bern | Stadion Lachen | |
| Urania Genève Sport | Geneva | Stade de Frontenex | |
| Yverdon-Sport FC | Vaud | Stade Municipal | |
The decider was played on 1 June in Solothurn. Yverdon-Sport FC win and remain in division. FC Thun are relegated directly to 2. Liga Interregional.
| Club | Canton | Stadium | Capacity |
|---|---|---|---|
| FC Bern | Bern | Stadion Neufeld | |
| FC Brunnen[7] | Schwyz | Wintersried | |
| SC Buochs | Nidwalden | Stadion Seefeld | |
| FC Concordia Basel | Basel-City | Stadion Rankhof | |
| FC Deitingen[8] | Solothurn | Heidenegg | |
| SR Delémont | Jura | La Blancherie | |
| FC Emmenbrücke | Lucerne | Stadion Gersag | |
| SC Kriens | Lucerne | Stadion Kleinfeld | |
| FC Laufen | Basel-Country | Sportplatz Nau | |
| FC Moutier[9] | Bern | Stade de Chalière | |
| FC Porrentruy[10] | Jura | Stade du Tirage | |
| FC Solothurn | Solothurn | Stadion FC Solothurn | |
| SC Zug | Zug | Herti Allmend Stadion | |
| Club | Canton | Stadium | Capacity |
|---|---|---|---|
| FC Baden | Aargau | Esp Stadium | |
| FC Blue Stars Zürich[11] | Zürich | Hardhof | |
| SC Brühl | St. Gallen | Paul-Grüninger-Stadion | |
| FC Chur | Grisons | Ringstrasse | |
| FC Frauenfeld | Thurgau | Kleine Allmend | |
| US Giubiasco[12] | Ticino | Campo Semine | |
| FC Gossau | St. Gallen | Sportanlage Buechenwald | |
| FC Locarno | Locarno, Ticino | ||
| FC Rapid Lugano[13] | Ticino | Cornaredo Stadium | |
| FC Red Star Zürich | Zürich | Allmend Brunau | |
| FC Rorschach[14] | Schwyz | Sportplatz Kellen | |
| FC Schaffhausen | Schaffhausen | Stadion Breite | |
| FC Uzwil[15] | St. Gallen | Rüti | |
The three group winners played a two legged tie against one of the runners-up to decide the three finalists. The games were played on 1 and 8 June.
FC Brunnen win 2–1 on aggregate and continue to the finals. FC Raron win 2–0 on aggregate and continue to the finals. 2–2 on aggregate. Giubiasco qualified as best classed in the regular season and continue to the finals.
FC Raron are 1. Liga champions, US Giubiasco are runners-up and these two teams are promoted.