Aim: To describe sports participation in Australian adolescents. Method: Use of time, demographic, pedometer and anthropometric data were collected on a random sample of 2200 9-16 year olds. Results: Moderate-to-vigorous physical activity (MVPA) constituted 29% of all energy expenditure, and sport 58% of MVPA energy expenditure. Sports participation peaked at 12-13 years at 70 min/day for boys, and 45 min/day for girls, but fell by 50% by age 16. Adolescents from the lowest income households experienced less sport (36 min/day) than adolescents from higher income households (46-49 min/day), however total minutes of MVPA did not differ. Obese adolescents experienced less sport (29 min/day) than normal weight or overweight adolescents (43-44 min/day). The most common sports were soccer, Australian Rules, dance, basketball, netball, Rugby League, tennis, cricket, hockey and swimming. Conclusion: This study highlights sporting "black holes" including low socio-economic position, obese and older female adolescents. (Contains 2 tables and 4 figures.)