This report presents information on the physical activity and sedentary participation rate of Australians across the life stages, reported against Australia’s Physical Activity and Sedentary Behaviour Guidelines. According to the most recent available data, 30% of children aged 2–17 and 44% of adults aged 18 and over met the physical activity guidelines. Most children exceeded the recommended amount of sedentary screen-based activity time, while the amount of time spent sitting at leisure increased in adults as aged increased.