Note: Deadlines are mid-October!
eScholar - Listing of federal government jobs, internships, scholarships, fellowships, and grants for students.
Makingthedifference.org - Search for federal internships by major in this internship directory.
The Politix Group - D.C. internships in politics and government.
AZA - Association of Zoos and Aquariums - Listing of Zoos & Aquariums which are accredited by the AZA. Many offer internships.
Research Experiences for Undergraduates listed by National Science Foundation are available in many science fields!
Internmatch.com - Search for all types of internships by geographic area and keywords. Best used for metropolitan areas.
Indeed.com - Text boxes to search on "what" and "where" or use advanced search. Searches other internship job boards to yield results.
INROADS - Program that offers paid, multi-year internships with top companies for minority students.
You Intern - Search for internships and read about how interns rate their experiences.