Many people have definitions for the term rural, but seldom are these rural definitions in agreement. For some, rural is a subjective state of mind. For others, rural is an objective quantitative measure. In this brief report the United States Department of Agriculture presents the following information along with helpful links for the reader: (1) Introduction to What is Rural; (2) Tools and Data Sources that Define Rural; (3) Define Rural for Health Programs; (4) Define Frontier; and (5) Rural America Values & Character. [This document was revised and updated by Louise Reynnells. The original edition was prepared by Patricia La Caille John.]