This directory lists the names, addresses, and telephone numbers of 2,418 organizations and organizational units in the United States that perform research activities related to education. The data were collected through the American Registry of Research and Research-Related Organizations in Education project (ARROE). If provided by an organization, additional information is included: (1) position of person to contact; (2) information about the organization's aims and purposes; (3) substantive foci of its research activities; (4) research staffing and professional staff specialties; (5) research funding, sources of support, and application of funds by research function and educational level; (6) means used to disseminate the results of the work; and (7) the availability of publications. The directory includes 684 local, state, and intermediate government units, 1,259 postsecondary education units, and 475 private organizations. Organizations are listed alphabetically by state. Two indexes are provided: Index I lists organizations by 63 substantive areas of work; Index II lists organizations by five educational levels to which their work is directed. (JD)