National Science Foundation
NSF has two Web sites devoted to statistics: Science and Engineering Statistics and Statistics on the Participation of Women, Minorities, and Persons with Disabilities in Science and Engineering Education and Employment.

Nelson Diversity Surveys
The Nelson Diversity Surveys are an analysis of the representation of women and minorities in faculty positions at the country’s top science and engineering departments.

National Center for Education Statistics
This web site has all sorts of statistics related to all levels of education.