Institutions of higher education were asked to report inventory information as of September 30, 1968, concerning floor space on their main campus and at any branch or extension center. The inventory was to be based on the "Higher Education Facilities and Inventory Procedures Manual." Of institutions enrolling 90% of the total student body, 82% responded. The gross area for all institutions was estimated to be nearly 1.5 billion square feet. Public institutions, with 71% of the full-time equivalent (FTE) enrollment, had 60% of the gross area; private institutions, with 29% of the FTE enrollment, had 40%. Of the reported assignable space, 63% was in public institutions and 37% in private ones. When facilities were classified by room type, the largest amount of assignable square feet--31% of the total--was reported to be residential facilities. Classrooms constituted less than 9% of the total. Public universities used less than 6% of their assignable space for classrooms, while public two year colleges used 19%. The survey form and a list of nonresponding institutions are included. (AF)