Early years The Geelong Basketball Club was established in 1977 with a men's team. The team entered the Victorian Championship and finished sixth in 1978 and fifth in 1979. In 1980, the team signed
Cal Bruton, Steven Kelocinski and Ray Shirley. That year, the side won three major tournaments and finished runners-up in the VBA championships. In 1981, the Geelong Cats debuted in the
South East Australian Basketball League (SEABL) and won the inaugural
SEABL championship and inaugural
ABA National championship. Geelong was subsequently invited to compete in the Converse Super Challenge in Adelaide against
Launceston (1981 national league winners),
West Adelaide (No. 1 team in South Australia), and
St Kilda (Australia's representative in the world championships in Brazil). Geelong emerged victors of the Super Challenge. The club was also the Victorian Summer Championship Premiers with a resounding victory over the national league team
Nunawading. With the victory, Geelong was accepted into the
National Basketball League (NBL) for the 1982 season. The Supercats finished with 388 NBL games over 15 years. In 2003, they finished fourth in the East conference with a 14–12 record before losing in the semi-final to Hume City. In 2004, they finished in fourth in the East conference with a 14–14 record. They went on to lose in the elimination semi-final before earning a wild card entry into the National finals due to Geelong being the host venue. There the Supercats were eliminated by the Sydney Comets in the first round. The women's program of Basketball Geelong, the
Geelong Lady Cats, played in the
Women's National Basketball League (WNBL) in
1986 and in the
Victorian Basketball League (VBL) during the 1990s. The team was an inaugural member of the
Big V in 2000. After winning the 2010
Big V championship, the team entered the SEABL for the first time in 2011. In 2017, the Supercats women won their first SEABL championship with a 76–67 grand final victory over the
Bendigo Braves.
NBL1 and new Geelong United ownership In 2019, following the demise of the SEABL, the Supercats joined the
NBL1 for the new competition's
inaugural season. The women's team reached the 2019 NBL1 grand final, where they lost 86–76 to the
Kilsyth Cobras. That same year, Basketball Geelong and
Corio Bay Basketball Association amalgamated under a new banner,
Geelong United Basketball (GUB). The Supercats did not play in
2020 due to the
COVID-19 pandemic. The teams officially became known as
Geelong United Supercats for the
2022 NBL1 season. In April 2024, GUB completed its branding change for the NBL1 teams from 'Supercats' to 'United'. In 2025, the Geelong United women's team went undefeated in the NBL1 South regular season with a 22–0 record. They went on to reach the NBL1 South Grand Final, where they lost 84–64 to the
Knox Raiders. ==NBL Season by season==