Lemhi County is a county located in the U.S. state of Idaho. As of the most recent data available, the county has a population of approximately 7,806 people, with a population density of about 1.71 persons per square mile.
The county spans a total land area of 4,564.00 square miles (11,821.00 square kilometers). The administrative center and county seat is Salmon, which often serves as a hub for local governance and services. The largest city within the county by population is Salmon.
Geographically, Lemhi County experiences varied elevations, with its highest point at Patterson 6,000 ft and its lowest point at Salmon 3,950 ft. The region operates in the UTC-7.