1999–2000 Nationalliga A

Nationalliga A
Season1999–2000
ChampionsSt. Gallen
2nd title
RelegatedDelémont
Top goalscorerCharles Amoah (25 goals)

The 1999–2000 season of the Swiss Nationalliga contained two divisions, each with twelve clubs. The top tier was called Nationalliga A (NLA) (French: Ligue Nationale A, Italian: Lega Nazionale A) and the second tier was named Nationalliga B (NLB).