The 1999 South Australian Soccer Federation season was the 93rd season of soccer in South Australia.
The 1999 South Australian Premier League season was the top level domestic association football competition in South Australia for 1999. It was contested by 12 teams in a single 22 round league format, each team playing all of their opponents twice.
The 1999 South Australian State League season was the second highest domestic level association football competition in South Australia. It was contested by 13 teams in a 26-round league format, each team playing all of their opponents twice.