The 1946–47 1. Liga season was the 15th 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.
Format
There were 36 teams competing in the 1. Liga this season. They were divided into three regional groups, each group with 12 teams. Within each group, the teams would play a double round-robin to decide their league position. Two points were awarded for a win and one point was awarded for a draw. The three group winners then contested a play-off round to decide the two promotion slots to the second-tier (NLB). The last placed team in each group were directly relegated to the 2. Liga (fourth tier).
FC Chiasso won and advanced to promotion play-offs. GC Biaschesi remained in the division for the following season.
Promotion round
The three group winners played a single round-robin to decide the overall championship and the two promotion slots. The promotion play-offs were held on 29 June, 6 and 13 July 1947.
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