This was the last season using a 14-team format.[1] The bottom 3 teams (which was subject to eligibility requirements) at the end of the season were relegated to the State League 1.[2] Perth Glory Youth was ineligible to receive prize monies in the end of season Top 4 Cup competition.
The 2018 WA State League 1 was composed of 11 teams playing 20 games over a 22 round season. Rockingham City as Champions were promoted to the National Premier Leagues WA, as they met eligibility criteria.[2] The 9th and 10th placed clubs played in a two-legged promotion/relegation playoff, whilst the last placed team (Joondalup City) were directly relegated to State League Division Two.
The highest tier domestic football competition in Western Australia is known as the BankWest Women's Premier League for sponsorship reasons. The 8 teams play each other three times, for a total of 21 matches over the regular season.
Western Australian soccer clubs competed in 2018 for the Football West State Cup. Clubs entered from the National Premier Leagues WA, the two divisions of the State League, a limited number of teams from various divisions of the 2018 Amateur League competition, and from regional teams from the South West, Goldfields, and Great Southern regions.
This knockout competition was won by Armadale SC, their 1st title.[3]