This report examines the public health issue of obesity in Australia, employing a systems thinking approach. It begins with an introduction to obesity as a medical condition, highlighting its negative impact on individuals and the efforts of the Australian government. The report then delves into the prevalence of obesity, providing statistical data and discussing contributing factors such as poor diet and lack of physical activity. A key section analyzes the roles of various stakeholders, including international organizations like WHO and UN, national and local governments, healthcare providers, private sector organizations, higher education institutions, and healthcare professionals. The report further identifies obstacles to applying a systems thinking approach, such as policy interventions, funding limitations, and educational disparities. Finally, it suggests improvements, including new governance arrangements and partnership working, to enhance the effectiveness of public health interventions aimed at reducing obesity rates. The report concludes by emphasizing the importance of collaborative efforts from all stakeholders in improving the well-being of the population.