Where is idaho in america

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Last updated: April 8, 2026

Quick Answer: Idaho is located in the Pacific Northwest region of the United States, bordered by six states: Washington, Oregon, Nevada, Utah, Wyoming, and Montana, as well as the Canadian province of British Columbia to the north. It became the 43rd state on July 3, 1890, and covers an area of 83,569 square miles, making it the 14th largest state by land area.

Key Facts

Idaho became the 43rd state on July 3, 1890
Idaho covers 83,569 square miles, ranking as the 14th largest U.S. state
The state's population was approximately 1.9 million as of 2023
Boise, founded in 1863, is the capital and largest city with over 235,000 residents
Idaho's highest point is Borah Peak at 12,662 feet above sea level

Overview

Idaho is a state in the Pacific Northwest region of the United States, known for its diverse geography that includes mountains, forests, rivers, and agricultural plains. The state's name is believed to have originated from a Native American term meaning "gem of the mountains," reflecting its mineral-rich landscape. Idaho's history dates back thousands of years with indigenous tribes like the Nez Perce, Shoshone, and Bannock inhabiting the region before European exploration began in the early 19th century.

The Lewis and Clark Expedition passed through northern Idaho in 1805-1806, marking the beginning of increased American interest in the area. Fur traders and missionaries followed, with the Oregon Trail bringing settlers in the 1840s. Idaho Territory was established in 1863 during the Civil War, and after significant population growth driven by mining discoveries, particularly gold and silver, Idaho achieved statehood in 1890. Today, it maintains a blend of agricultural heritage, outdoor recreation, and growing technology sectors.

How It Works

Understanding Idaho's location involves examining its geographical positioning, political boundaries, and regional characteristics.

Geographical Coordinates: Idaho spans from approximately 42°N to 49°N latitude and 111°W to 117°W longitude, placing it in the Mountain Time Zone (except for the northern panhandle, which observes Pacific Time). The state's distinctive shape features a narrow northern panhandle that stretches about 45 miles wide at its narrowest point, separating Washington and Montana.
Political Boundaries: Idaho shares borders with six U.S. states: Washington to the west, Oregon to the southwest, Nevada and Utah to the south, Wyoming to the east, and Montana to the northeast. To the north, it borders the Canadian province of British Columbia along a 45-mile international boundary. These borders were established through various treaties and surveys, with the southern border finalized by the 1868 survey following the Oregon Treaty of 1846.
Regional Classification: Idaho is primarily considered part of the Pacific Northwest, along with Washington and Oregon, though its eastern portions share characteristics with the Rocky Mountain region. The U.S. Census Bureau classifies Idaho as part of the West Region, specifically the Mountain Division. This regional identity influences climate, economy, and culture, with the state experiencing both maritime influences in the north and continental conditions in the south.
Transportation Access: Major interstate highways include I-84 running east-west across southern Idaho and I-15 running north-south through eastern Idaho, connecting the state to national transportation networks. The state has 16 public airports, with Boise Airport serving as the largest, handling over 4 million passengers annually. These routes facilitate trade and travel, positioning Idaho as a crossroads between the Pacific Coast and interior states.

Key Comparisons

Feature	Idaho	Neighboring State (Montana)
Land Area	83,569 sq mi (14th largest)	147,040 sq mi (4th largest)
Population (2023 est.)	1.9 million	1.1 million
Highest Point	Borah Peak: 12,662 ft	Granite Peak: 12,807 ft
Statehood Date	July 3, 1890 (43rd)	November 8, 1889 (41st)
Capital City Population	Boise: ~235,000	Helena: ~33,000

Why It Matters

Economic Significance: Idaho's location contributes to a $100 billion GDP economy, with agriculture (particularly potatoes, producing 30% of U.S. supply), technology, and manufacturing as key sectors. Its position between major markets facilitates trade, with exports totaling $5.4 billion in 2022, including machinery, food products, and computer equipment shipped via its transportation corridors.
Environmental Importance: The state contains portions of significant river systems like the Snake River, which flows 1,078 miles through Idaho, supporting irrigation for 3.8 million acres of farmland and hydroelectric power generation. Idaho's forests cover 21 million acres (about 40% of the state), contributing to biodiversity and recreation, with protected areas including Yellowstone National Park's western edge.
Cultural and Historical Impact: Idaho's location along migration routes like the Oregon Trail shaped American westward expansion, with over 400,000 settlers passing through in the mid-1800s. The state's Native American heritage remains visible, with reservations covering 1.2 million acres, preserving traditions of tribes such as the Nez Perce, whose historical territory spanned 17 million acres across Idaho, Oregon, and Washington.

Looking forward, Idaho's strategic location will continue to influence its development as population growth (increasing by 15% from 2010-2020) and economic diversification progress. The state's position between coastal tech hubs and inland resources positions it for continued relevance in agriculture, technology, and renewable energy, while its natural landscapes face balancing conservation with increasing recreational use from both residents and visitors.