The development over the last decade of geographical classifications for Australia that describe areas in terms of relative remoteness has provided an opportunity to compare a wide range of health and welfare indicators across Australia's major cities, regional and remote areas. This publication reviews the methodology behind the three major classifications that describe areas in this way - the RRMA (Rural, Remote and Metropolitan Areas) classification, the ARIA (Accessibility/Remoteness Index of Australia) classification and the ASGC (Australian Standard Geographical Classification) Remoteness Areas classification. This publication also summarises each classification's strengths and weaknesses and describes how the classifications are applied to administrative and survey data.