| Competition: | 1. Liga |
| Season: | 1964–65 |
| Winners: | 1. Liga champions: St. Gallen Group West: Etoile Carouge FC Group Cenral: FC Langenthal Group South and East: St. Gallen |
| Promoted: | St. Gallen FC Blue Stars Zürich |
| Relegated: | Group West: ES FC Malley FC Renens Group Central: FC Breitenbach FC Gerlafingen Group South and East: FC Bodio FC Turgi |
| Matches: | 3 times 156 and 1 decider plus 12 play-offs |
| Prevseason: | 1963–64 |
| Nextseason: | 1965–66 |
The 1964–65 1. Liga season was the 33rd season of the 1. Liga 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 total amateur football. The two higher divisions in Switzerland, at this time, were becoming professional or semi-professional.
There were 39 teams competing in the 1. Liga 1965–66 season. They were divided into three regional groups, each group 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 three runners-up then contested a play-off round to decide the two promotion slots. The last two placed teams in each group were relegated to the 2. Liga (fourth tier).
| Club | Based in | Canton | Stadium | Capacity |
|---|---|---|---|---|
| CS Chênois | Thônex | Stade des Trois-Chêne | ||
| Étoile Carouge FC | Carouge | Stade de la Fontenette | ||
| FC Fribourg | Fribourg | Stade Universitaire | ||
| ES FC Malley | Malley | Centre sportif de la Tuilière | ||
| FC Martigny-Sports | Martigny | Stade d'Octodure | ||
| FC Forward Morges[1] | Morges | Parc des Sports | ||
| FC Raron[2] | Raron | Sportplatz Rhoneglut | ||
| FC Renens[3] | Renens | Zone sportive du Censuy | ||
| FC Stade Lausanne | Ouchy, Lausanne | Centre sportif de Vidy | ||
| FC Versoix[4] | Versoix | Centre sportif de la Bécassière | ||
| Vevey Sports | Vevey | Stade de Copet | ||
| Xamax | Neuchâtel | Stade de la Maladière | ||
| Yverdon-Sport FC | Yverdon-les-Bains | Stade Municipal | ||
The decider match for second place was played on 6 June at Stade Municipal in Yverdon-les-Bains. FC Fribourg win and advance to play-offs. FC Forward Morges remain in the division.
| Club | Based in | Canton | Stadium | Capacity |
|---|---|---|---|---|
| FC Alle | Alle | Centre Sportif Régional | ||
| FC Breitenbach[5] | Breitenbach | Grien | ||
| SC Burgdorf[6] | Burgdorf | Stadion Neumatt | ||
| FC Concordia Basel | Basel | Stadion Rankhof | ||
| SR Delémont | Delémont | La Blancherie | ||
| FC Emmenbrücke | Emmen | Stadion Gersag | ||
| FC Fontainemelon[7] [8] | Neuchâtel | Centre Sportif Fontainemelon | ||
| FC Gerlafingen[9] | Gerlafingen | Kirchacker | ||
| FC Langenthal[10] | Langenthal | Rankmatte | ||
| FC Minerva Bern | Bern | Spitalacker | ||
| FC Nordstern Basel | Basel | Rankhof | ||
| FC Olten[11] | Olten | Sportanlagen Kleinholz | ||
| FC Wohlen | Wohlen | [12] | ||
| Club | Based in | Canton | Stadium | Capacity |
|---|---|---|---|---|
| FC Blue Stars Zürich[13] | Zürich | Hardhof | ||
| FC Bodio[14] | Bodio | Campo comunale Pollegio | ||
| FC Dietikon[15] | Dietikon | Fussballplatz Dornau | ||
| FC Locarno | Locarno | |||
| FC Oerlikon/Polizei ZH[16] | Oerlikon (Zürich) | Sportanlage Neudorf | ||
| FC Red Star Zürich | Zürich | Allmend Brunau | ||
| FC Rorschach[17] | Rorschach | Sportplatz Kellen | ||
| FC St. Gallen | St. Gallen | Espenmoos | ||
| FC Turgi[18] | Turgi | Sportanlage Oberau | ||
| FC Vaduz | Vaduz | Liechtenstein | Rheinpark Stadion | |
| FC Wettingen | Wettingen | Stadion Altenburg | ||
| FC Widnau[19] | Widnau | Sportanlage Aegeten | ||
| SC Zug | Zug | Herti Allmend Stadion | ||
The three group winners and the runners-up played a round-robin against the four teams who had not been in their group. The teams did not play against the team that had been in the same group.
The first games were played on 13 June 1965.The second round was played on 20 June.The third round was played on 27 June.The final round was played on 4 July.
St. Gallen are declaired 1. Liga champions due to their position in the regular season.