The 1990–91 National Soccer League season, was the 15th season of the National Soccer League in Australia.
Regular season
League table
Finals series
Individual awards Player of the Year: Milan Ivanovic (Adelaide City) U-21 Player of the Year: Paul Okon (Marconi Fairfield) Top Scorer: David Seal (Marconi Fairfield) – 19 goals Coach of the Year: Zoran Matic (Adelaide City)
References Australia - List of final tables (RSSSF) NSL Awards at ozfootball.net