- Capital: Boise, ID
- Largest City: Boise, ID
- Area: 83,642 sq mi
- Rank: 13
- Population (2010): 1,567,582
- Rank: 39
- Admission to Union: July 3, 1890
- Time Zone: Mountain (some in Pacific in North)
Idaho is a state in the northwestern United States that is located largely in the Rocky Mountains. While the state has a short border with Canada to the north, most of its population resides in the larger southern portion, where the capital and largest city, Boise, ID, is located. Idaho has generally been a relatively marginal state in professional baseball and most teams from the state have been at the lower levels of the minor league classification, either in the Northwest League (a Short-season Class A circuit) and the Pioneer League (at the Rookie classification).
Most famously, Hall of Famer Walter Johnson was first discovered pitching for a team in Weiser, ID in the semi-pro Southern Idaho League. The most famous player born in Idaho is Hall of Fame slugger Harmon Killebrew.
- Bill Gruber: Baseball in a Grain of Sand: Seeing the Game through a Small Town Season, McFarland, Jefferson, NC, 2018. ISBN 978-1-4766-7317-2