Boise ( /ˈbɔɪsiː/) is the capital and most populous city of the U.S. state of Idaho, as well as the county seat of Ada County. Located on the Boise River, it anchors the Boise City-Nampa metropolitan area and is the largest city between Salt Lake City, Utah and Portland, Oregon.

As of the 2010 Census, Boise's city population was 205,671. The Boise metropolitan area is home to about 616,500 people and is the most populous metropolitan area in Idaho, and the third most populous metropolitan area in the U.S. Pacific Northwest region (behind only the Seattle, WA and Portland, OR metropolitan areas). It is also the 104th largest U.S. city by population.

Idaho (ⁱ/ˈaɪdəhoʊ/) is a state in the Rocky Mountain area of the United States. Idaho is the 14th most expansive, the 39th most populous, and the 7th least densely populated of the 50 United States. The state's largest city and capital is Boise. Residents are called "Idahoans". Idaho was admitted to the Union on July 3, 1890, as the 43rd state.

Idaho is a mountainous state with an area larger than that of all of New England. It is landlocked, surrounded by the states of Washington, Oregon, Nevada, Utah, Wyoming, Montana and the Canadian province of British Columbia. However, the network of dams and locks on the Columbia River and Snake River make the city of Lewiston the farthest inland seaport on the Pacific coast of the contiguous United States.

Idaho's nickname is the Gem State, because nearly every known type of gemstone has been found there. In addition, Idaho is one of only two places in the world where star garnets can be found (the other is the Himalaya Mountains, in India)^{[citation needed]}, and is the only place six-pointed star garnets have been found^{[citation needed]}. Additionally Idaho is sometimes called the Potato State owing to its popular crop. The state motto is Esto Perpetua (Latin for "Let it be forever").