Geelong Roller Derby League was created in 2008.
Varsity Roller Derby League was created in 2011.
National Roller Derby League was created in 1995.
Canberra Roller Derby League was created in 2008.
Newcastle Roller Derby League was created in 2009.
Victorian Roller Derby League was created in 2007.
Sydney Roller Derby League was created in 2008.
Malice Springs Roller Derby League was created in 2010.
Convict City Roller Derby League was created in 2009.
West Kootenay Women's Roller Derby League was created in 2009.
The minimum age to join junior roller derby can vary depending on the league, but generally participants are between 7-17 years old. It's best to check with the specific league you are interested in for their age requirements.
Humboldt Roller Derby was created in 2007.