1997–98 Swiss 1. Liga

The '''1997–98 Swiss 1. Liga''' was the 66th 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.

Format
There were 56 clubs in the 1. Liga, divided into four regional groups of 14 teams. Within each group, the teams would play a double round-robin to decide their league position. The four group winners and the four runners-up then contested a play-off for the two promotion slots. The two last placed teams in each group were directly relegated to the 2. Liga Interregional (fourth tier). The four third last placed teams would compete a play-out against the ninth relegation place.

Decider
Because the teams from FC Gossau and Zug 94 ended the season level on points they had to play a league positions decider. The match was played on a neutral ground and it took place on 19 May 1998 in Allmend Brunau (Zürich).

 Zug 94 win the decider and advance to play-offs.

Qualification round
 Muttenz win 6–2 on aggregate and continue to the finals.

 Stade Nyonnais win 2–1 on aggregate and continue to the finals.

 Chiasso win 2–1 on aggregate and continue to the finals.

''Aggregate 4–4. Serrières win in overtime and continue to the finals.''

Final round
 Stade Nyonnais win 4–2 on aggregate and are promoted to Nationalliga B.

 Chiasso win 4–0 on aggregate and are promoted to Nationalliga B.

First round
SV Lyss continue to the final.

Dornach continue to the final.

Final round
''SV Lyss win 7–1 on aggregate. Dornach are relegated to 2. Liga.''