As a faculty member of Public Health Medicine from the United Kingdom, I will examine our experiences developing the public health function in the United Kingdom, which may help other countries in their efforts. By "public health function", I refer to the context, and particularly the organization, of public health. As the Director of Public Health for Oxfordshire (the country surrounding, and including, the city of Oxford), I have extensive practical experience with a public health department at a local level, as well as involvement with some national initiatives. This paper briefly reviews the development of public health in the United Kingdom, highlighting current key issues. While I am not an expert in international health, I will refer to what we have learned, and are learning, to suggest some implications for developing countries. [To view this article, please download the PDF.]