NBL1 replaced the former SBL to create more professional pathways and opportunities for males and females playing basketball in Western Australia.

In 1988, it was decided to form a State Basketball League for both men and women, and in 1989 the SBL made its debut season with three new franchises established in country areas: Rainbow Coast Raiders from Albany, Batavia Buccaneers from Geraldton, and Souwest Slammers from Bunbury.

[5] Due to the COVID-19 pandemic, the 2020 SBL season was cancelled and later replaced by the amateur-based West Coast Classic.

The Willetton Tigers have won the most championships in the women's competition with 9 Grand Final wins, while the Perry Lakes Hawks have won the most championships in the men's competition with 7 Grand Final wins.

The Hawks women have also amassed seven titles, making Perry Lakes the most successful club in league history with a total of 14 championships.