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.[1]
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.[2]