| Country: | Switzerland |
| Season: | 1972–73 |
| Division1: | Nationalliga A |
| Champions1: | Basel |
| Division2: | Nationalliga B |
| Champions2: | Xamax |
| Division3: | 1. Liga |
| Champions3: | 1. Liga champions: FC Nordstern Basel Group West: FC Monthey Group Cenral: FC Nordstern Basel Group South and East: FC Tössfeld |
| Domestic: | 1972–73 Swiss Cup |
| Dchampions: | Zürich |
| Domestic2: | 1972 Swiss League Cup |
| Dchampions2: | Basel |
| Wdivision1: | Swiss Women's Super League |
| Wchampions1: | DFC Aarau |
| Prevseason: | 1971–72 |
| Nextseason: | 1973–74 |
| Flagicon: | yes |
The following is a summary of the 1972–73 season of competitive football in Switzerland.
See main article: 1972–73 Nationalliga A.
Chênois won and were promoted to 1973–74 Nationalliga A. Luzern remained in division.
See main article: 1972–73 Swiss 1. Liga.
The decider was played on 3 June in Solothurn. The game was drawn, however, at this period in time, the extra-time as match extension had not yet been introduced. FC Concordia Basel were declaired winners due to the better goal-average of the regular season and, therefore, they remained in the division. FC Turgi were relegated to 2. Liga Interregional.
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 3 and 10 June.
FC Nordstern Basel win 9–3 on aggregate and continue to the finals. FC Tössfeld win 6–4 on aggregate and continue to the finals. SR Delémont win 4–1 on aggregate and continue to the finals.
The three first round winners competed in a single round-robin to decide the two promotion slots. The games were played on 17, 24 June and 1 July.FC Nordstern Basel are champions, because they beat Tössfeld in the head-to-head and Tössfeld are runners-up. These two teams are promoted.
The competition was played in a knockout system. In the case of a draw, extra time was played. If the teams were still level after extra time, the match was replayed at the away team's ground. Here, in case of a draw after extra time, the replay was to be decided with a penalty shoot-out. The quarter- and semi-finals were played as two legged rounds, home and away. The final was held in the Wankdorf Stadium in Bern.
The routes of the finalists to the final were:
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See main article: 1972 Swiss League Cup. The 1972 League Cup was played as a pre-season tournament. The semi-finals and the final itself, however, was played after the season had commenced. The early stage was a group stage. The finalists Basel and Winterthur had a bye in this stage and they joined in the first round on 5 August.
The routes of the finalists to the final were:
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See main article: 1972–73 European Cup.
Újpesti Dózsa won 4–3 on aggregate.
See main article: 1972–73 European Cup Winners' Cup.
Wrexham won 3–2 on aggregate
See main article: 1972 Intertoto Cup.
See main article: 1972–73 UEFA Cup.
Grasshoppers won 4–2 on aggregate.
Ararat Yerevan won 7–3 on aggregate.
See main article: 1972 Intertoto Cup.
See main article: 1972–73 UEFA Cup.
Red Star Belgrade won 7–4 on aggregate.
See main article: 1972 Intertoto Cup.
See main article: 1972 Intertoto Cup.