The "Greenback Letters" refer to a series of letters which were originally published in the off-beat conservative think-piece Reagonomics Review between 1982 and 1985.

The letters were written by a senior Economic Analyst in the Reagan administration, although the identity of the author remains confidential. There were 26 letters in total, and they were distinguished by their  plain-talking critique of Government policy at the time, and their wide-reaching strategic overview of the United States position in the world.