Bamford stated ~70,000 in the seventies in one of his books. The Wiki estimates 30,000. 550 is a comically low guess. We can get at a much larger guess than 550

Bamford stated ~70,000 in the seventies in one of his books. The Wiki estimates 30,000. 550 is a comically low guess. We can get at a much larger guess than 550 merely by counting parking places at Ft. Meade, and that wouldn't include the many employees who don't work at Ft. Meade.