The Australian Basketball Association, often abbreviated to the ABA, is the second-tiered semi-professional men's and women's basketball minor leagues in Australia which sit under the professional National Basketball League (NBL) and Women's National Basketball League (WNBL).

The ABA is representative of the huge number of junior-based associations across the country and is the endorsed national development league of the sport’s peak body, Basketball Australia.

The ABA incorporates five regional leagues – the Big V (Victoria), Central Australian Basketball League (Central ABL), Queensland Basketball League(QBL), South East Australian Basketball League (SEABL), and Waratah League (New South Wales) in both men's and women's competitions.