This directory of urban affairs information and research centers seeks to bring to the attention of urban researchers those organizations, agencies, and institutions which are actively involved in the eradication of current urban ills. Although most of the urban interest groups listed are research oriented, a great many are directly involved in local community governments and neighborhood groups. Nearly every organization questioned indicated that it would respond to legitimate requests for information from researchers. The information for this directory was compiled from questionnaires. An attempt has been made to list organizations conducting research in every aspect of the urban scene, from air pollution to zoning. The directory is divided into four parts; organizations are listed alphabetically, geographically by state, according to name of university or college affiliation, and according to subject matter. (Compiler/JW)