The Foreign Relations of the United States series is the official documentary historical record of major U.S. foreign policy decisions that have been declassified and edited for publication. The series is produced by the State Department's Office of the Historian and printed volumes are available from the Government Printing Office.

This digital facsimile of FRUS is a project of the University of Wisconsin-Madison Libraries in collaboration with the University of Illinois at Chicago Libraries. An almost complete run from 1861-1960 with missing volumes being added as they can be acquired.