It borders the state of Montana to the east and northeast, Wyoming to the east, Nevada and Utah to the south, and Washington and Oregon to the west. To the north, it shares a small portion of the Canadian border with the province of British Columbia. With a population of approximately 1.8 million and an area of 83,570 square miles (216,400 km2), Idaho is the 14th largest, the 12th least populous and the 7th least densely populated of the 50 U.S. states. The state's capital and largest city is Boise.

• Population: 1,839,106
• Area: 83,569 sq mi
• Capital: Boise
• Largest City: Boise
• Date of Admisson: Jul 3, 1890
• Number of Representatives: 2
• Number of Counties: 44

List of counties: