The Online Encyclopedia for Genetic Epidemiology studies aims to collate information and links* about and for genetic research studies relevant to population genetics and health. It gives annotated links to the world’s population and case/family genetic epidemiological studies and relevant gene and sequence databases, genetic variation databases, trait measurement, resource labs, journals, software, general information, disease genes and genetic diversity. Tools and tutorials will be added. It is designed to help professionals working in this or associated fields, acting as a World Wide Web portal for Genetic Epidemiology studies, but it may also be of interest to genealogists and historians interested in molecular genealogy. (* New links can be submitted here, or other suggestions to webmaster@oege.org .)