It's roughly 5 million people. The number fluctuates, but way more than 1 million people have US government issued security clearances. http://www.defenseone.c

It's roughly 5 million people. The number fluctuates, but way more than 1 million people have US government issued security clearances. http://www.defenseone.com/business/2015/04/number-security-clearance-holders-drops-12-percent/111268/ http://www.defenseone.com/business/2015/04/number-security-c...