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Portal:Idaho

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The Idaho Portal

The University of Idaho in Moscow, Idaho, circa 1915
The University of Idaho in Moscow, Idaho, circa 1915
The flag of Idaho

Idaho (/ˈdəh/ , EYE-də-hoe) is a landlocked state in the Pacific Northwest and Mountain West subregions of the Western United States. It borders Montana and Wyoming to the east, Nevada and Utah to the south, and Washington and Oregon to the west; the state shares a small portion of the Canada–United States border to the north with the Canadian province of British Columbia. 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.

For thousands of years, and prior to European colonization, Idaho had been inhabited by natives. In the early 19th century, Idaho was considered part of the Oregon Country, an area which was disputed between the U.S. and the British Empire. Idaho officially became a U.S. territory with the signing of the Oregon Treaty of 1846, but a separate Idaho Territory was not organized until 1863, instead being included for periods in Oregon Territory and Washington Territory. The state was eventually admitted to the Union on July 3, 1890, becoming the 43rd state.

Forming part of the Pacific Northwest (and the associated Cascadia bioregion), Idaho is divided into several distinct geographic and climatic regions. The state's north, the relatively isolated Idaho Panhandle, is closely linked with Eastern Washington, with which it shares the Pacific Time Zone—the rest of the state uses the Mountain Time Zone. The state's south includes the Snake River Plain (which has most of the population and agricultural land), and the southeast incorporates part of the Great Basin. Idaho is quite mountainous and contains several stretches of the Rocky Mountains. The United States Forest Service holds about 38% of Idaho's land, the highest proportion of any state. (Full article...)

The history of Idaho is an examination of the human history and social activity within the state of Idaho, one of the United States of America located in the Pacific Northwest area near the west coast of the United States and Canada. Other associated areas include southern Alaska, all of British Columbia, Washington, Oregon, western Montana and northern California and Nevada. (Full article...)

Did you know

  • ... that in its first full month on the air, an Idaho TV station had the highest prime-time viewing share of any independent station in the United States?
  • ... that several mining communities in Idaho during the late 19th century were majority-Chinese?
  • ... that some Idaho mountain deathcamas are pollinated by carrion and flesh flies rather than bees?
  • ... that an Idaho TV station lost its network affiliation after less than two years on the air but did not permanently close for another decade?
  • ... that a new soccer team in Boise, Idaho, plans to play at a converted horse racing track?
  • ... that the Idaho State Veterans Cemetery faced criticism in 2014 when it did not allow a lesbian couple to be buried together?
  • ... that Warren Truitt served as a legislator in Oregon and a judge in Alaska in the 19th century, and as both a legislator and a judge in Idaho in the 20th?
  • ... that Pocatello mayor Les Purce was the first African-American political officeholder in Idaho?
  • ... that Idaho's Ridgevue High School collaborated with a local museum to select their mascot, which honors the P-40 Warhawk World War II fighter plane?
  • ... that an Idaho TV station warned businesses, "The rumors of our going dark are not unfounded"?

Idaho news

August 1, 2026 – 2026 Twin Falls shooting
Four people are killed, including the perpetrator, and seven others are injured in a mass shooting at an In-N-Out restaurant in Twin Falls, Idaho, United States. (CNN) (Reuters)
May 17, 2026 –
A collision involving two EA-18G Growler jets of the US Navy's Electronic Attack Squadron 129 occurs at an air show at the Mountain Home Air Force Base in Idaho. All four pilots escaped and ejected safely. (NPR) (The Aviationist)

Recognized content

2008 Humanitarian BowlBoise National ForestWilliam BorahCutthroat troutErnest HemingwayHarmon KillebrewSawtooth National Forest

Idaho's congressional delegationsList of governors of IdahoList of longest streams of Idaho

Good articles

1970 Idaho gubernatorial election2016 Famous Idaho Potato BowlBeulah Ream AllenLeonard J. ArringtonBeaver dropDavid B. BleakBurke CanyonBurke, IdahoCoeur d'Alene, IdahoUSS Idaho (BB-42)Interstate 86 (Idaho)KIFI-TVKootenay RiverH. Rex LeeThe Oregon Trail (1971 video game)The Oregon Trail (1985 video game)PotatoPotlatch RiverJane SeveranceSnake RiverTwin Falls saucer hoaxU.S. Route 195Brad White (defensive lineman)

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