In 2004-05, Australia spent $3.3 billion directly on the management of respiratory conditions. In 2007-08, general practitioners managed respiratory problems more than any other condition and in 2006 conditions of the respiratory system were the third most common underlying causes of death. This report presents the epidemiology of each of the main respiratory conditions and highlights their differences and similarities. The conditions addressed include asthma, chronic obstructive pulmonary disease, allergic rhinitis, chronic sinusitis, influenza, pneumonia, bronchiectasis, cystic fibrosis, pneumoconiosis and sleep apnoea.