The season began on 6 October 2017 and ended with the Grand Final on 5 May 2018.

[1] Sydney FC won the A-League minor premiership, while Melbourne Victory won the Championship after defeating the Newcastle Jets 1–0 in the Grand Final on 5 May 2018; this marked the first time in A-League history in which the Championship was won by a team which finished outside the top 2.

The following do not fill a Visa position: 1Those players who were born and started their professional career abroad but have since gained Australian citizenship (and New Zealand citizenship, in the case of Wellington Phoenix);[23] 2Australian citizens (and New Zealand citizens, in the case of Wellington Phoenix) who have chosen to represent another national team; 3Injury Replacement Players, or National Team Replacement Players; 4Guest Players (eligible to play a maximum of fourteen games)

These are the attendance records of each of the teams at the end of the home and away season.

Source: a-league.com.au During the season each club is given fair play points based on the number of cards they received in games.