1965–66 Nationalliga A

The following is the summary of the Swiss National League in the 1965–66 football season, both Nationalliga A and Nationalliga B. This was the 69th season of top-tier and the 68th season of second-tier football in Switzerland.

Overview

The Swiss Football Association (ASF/SFV) had 28 member clubs at this time which were divided 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 1964–65 season and the two newly promoted teams Urania Genève Sport and Young Fellows. The champions would qualify for the 1966–67 European Cup and the last two teams in the league table at the end of the season were to be relegated.

The second-tier (NLB) was contested by the two teams that had been relegated from the NLA, Bellinzona and Chiasso, the ten teams that had been in third to twelfth position last season and the two newly promoted teams St. Gallen and Blue Stars. The top two teams at the end of the season would be promoted to the 1967–68 NLA and the two last placed teams would be relegated to the 1967–68 Swiss 1. Liga.

The Swiss champions received a slot in the 1966–67 European Cup and the Cup winners a slot in the 1966–67 Cup Winners' Cup. FC Zürich won the championship and also won the Swiss Cup. Thus they won the double for the first time in the club's history. They participated in the European Cup the following season and the slot in the Cup Winner's Cup was passed on to Servette as losing finalist.