Franklin County is a county located in the U.S. state of Idaho. As of the 2010 Census the county had a population of 12,786. The county seat and largest city is Preston. The county was established in 1913 and named after Franklin D. Richards, an Apostle of The Church of Jesus Christ of Latter-day Saints. It is the only Franklin County in the United States that is not named after Benjamin Franklin.

Franklin county is not organized, contact morgan@idahodems.org for more information.