Franklin 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 11,329 people, with a population density of about 17.01 persons per square mile.
The county spans a total land area of 666.00 square miles (1,725.00 square kilometers). The administrative center and county seat is Preston, which often serves as a hub for local governance and services. The largest city within the county by population is Preston.
Geographically, Franklin County experiences varied elevations, with its highest point at Mink Creek 5,140 ft and its lowest point at Franklin 4,504 ft. The region operates in the UTC-7.