ID History & Facts
County Information - Idaho
By Cynthia Kirkeby
May 6, 2006, 21:35 PST

County Information for Idaho


There are 44 counties in the state of Idaho.

The largest Idaho county by size is Idaho County, which is 8,485 square miles.

The largest Idaho county by population is Ada County, which has a population of 300,904.

Source: National Association of Counties


Here are Idaho QuickFacts from the U.S. Census Bureau.