Idaho's state capital and largest city is Boise. With an area of 83,569 square miles (216,440 km2), Idaho is the 14th-largest state by land area. The state has a population of approximately two million people; it ranks as the 13th-least populous and the seventh-least densely populated of the 50 U.S. states.

Find Idaho services, resources, and information in one place. Explore government, business, education, outdoor activities, and tools to help you live and thrive here.

The Boise metropolitan area, located in the Treasure Valley, includes five counties of Idaho with an estimated population of 846,000, the most populous metropolitan area in Idaho and 95th-most populous in the United States.

Geographical and historical treatment of Idaho, including maps and a survey of its people, economy, and government. Idaho is shaped much like a logger’s boot, thereby accidentally reflecting the state’s rugged forested and mountainous terrain in which logging and mining play major roles.

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Idaho is a dream destination for the outdoors, home to the largest designated wilderness in the lower 48 states. Explore Hells Canyon, the deepest river gorge in North America, then roam parks and preserves filled with spectacular waterfalls, ancient lava flows, cinematic sand dunes, sparkling lakes and towering mountains.

Our expert travel guides have curated the ultimate Idaho itineraries — from a quick Boise weekend escape to an epic 2-week loop through all five regions. Get insider tips on the best seasons to visit, how to get around, where to stay, and hidden gems only locals know about.

Discover Idaho’s history, symbols, holidays, and natural wonders. Explore quick facts and family-friendly resources to learn what makes our state unique.

Idaho, also known as “The Gem State”, is a state located in the Western United States. It shares its northern border with Canada, its eastern border with Montana and Wyoming, its southern border with Utah and Nevada, and its western border with Washington and Oregon.