State Abbreviation ID
State Capital Boise
State Size Total (Land + Water): 83,570 sq miles; Land Only: 82,747 sq miles
Number of Counties 44
Time Zone Mountain Time Zone, Pacific Time Zone
Bordering States Montana, Nevada, Oregon, Utah, Washington, Wyoming
Highest Point Borah Peak, 12,668 feet
National Parks None
State Population (2015) 1,654,930
State Population Density 20.0 people / square mile
Area Codes 208
Top 5 Cities (2010 population)
Idaho Falls (56,813)
State Amphibian Idaho giant salamander
State Bird Mountain bluebird
State Dance Square dance
State Fish Cutthroat trout
State Flower Syringa
State Fossil Hagerman horse fossil
State Fruit Huckleberry
State Gem Idaho star garnet
State Horse Appaloosa horse
State Insect Monarch butterfly
State Motto Esto perpetua (Let it be perpetual)
State Nickname Gem State
State Raptor Peregrine falcon
State Tree Western white pine
State Vegetable Potato
•Idaho is a made-up word. When Congress was considering a name for present-day Colorado, lobbyist George Willing suggested the name "Idaho," claiming it was an Indian word that means "gem of the mountains." This name was not chosen for Colorado, but two years later it was used when the Idaho Territory was created in 1863.
•American Falls is unique from most communities because the entire town was moved in the mid-1920s when the original American Falls Dam was constructed.
•Hell's Canyon is the deepest gorge in America at 7,993 feet.
•Idaho is called the "Gem State" because nearly every known type of gemstone has been found in the state of Idaho. More than 72 different precious and semi-precious gemstones are mined from Idaho.
•Idaho is the only state in the United States with an official State Raptor, peregrine falcon.
•Soda Springs boasts the largest man-made geyser in the world.
•Idaho is one of only two places in the world where star garnets can be found in any significant quantities (India is the other).
•The statehouse in Boise is geothermally heated from underground hot springs.
•On July 17, 1955, the town of Arco became the first city in the world to be lit by atomic energy.
•Idaho's Shoshone Falls is called the "Niagara of the West." It is 212 feet high—45 feet higher than Niagara Falls.
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