Present Day SEASON A GRADE A GRADE T20 B GRADE B GRADE T20 2008-09 Melville Subiaco Marist Whitfords 2009-10 Midland-Guildford Melville Midland-Guildford Midland-Guildford 2010-11 South Perth Melville Melville South Perth 2 2011-12 Melville Melville Melville Midland-Guildford 2012-13 Melville Midland-Guildford South Perth Melville 2013-14 Melville Subiaco Marist University University 2014-15 Melville Subiaco Floreat University Midland-Guildford 2015-16 Midland-Guildford Melville Midland-Guildford University 2016-17 Midland-Guildford Midland-Guildford Melville Melville 2017-18 Melville Melville Melville Subiaco Floreat 2018-19 Subiaco Floreat Melville Melville Melville 2019-20 Melville South Perth Melville South Perth 2020-21 Midland-Guildford Melville Melville South Perth 2021-22 Subiaco-Floreat Melville Wanneroo Melville 2022-23 Melville Midland-Guildford Wanneroo Melville 2023-24 Midland-Guildford Midland-Guildford South Perth Midland-Guildford *Where a premier is listed as 'X & Y', joint premiers were declared either through a tie or a washout *Highest Ranked Team in A & B Grade One Day Competitions were awarded the Premiership after Elimination Final Round in 2019-20 due to COVID-19 Pandemic
