The map above shows United States and Idaho side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
United States vs Idaho Geography
Land area
- United States has a land area of 3,533,467 square miles (9,151,637 km²), while Idaho has 82,645 square miles (214,051 km²).
- United States' land area is 42.8 times larger than Idaho's.
Total area
- United States: 3,802,784 square miles (9,849,165 km²) vs Idaho: 83,569 square miles (216,441 km²), including inland and coastal water.
- United States' total area is 45.5 times larger than Idaho's.
Length
- United States is 3,628 miles (5,839 km) long from north to south; Idaho is 483 miles (778 km).
- United States' north-south length is 7.5 times (651%) longer than Idaho's.
Width
- United States spans 4,824 miles (7,763 km) east to west; Idaho spans 352 miles (566 km).
- United States' east-west width is 13.7 times wider than Idaho's.
Highest point
- United States's highest point is Denali at 20,308 feet (6,190 m); Idaho's is Borah Peak at 12,631 feet (3,850 m).
- Denali is 7,677 feet higher than Borah Peak.
Lowest point
- United States's lowest point is Death Valley at -279 feet; Idaho's is Snake River at 718 feet.
- United States's lowest point is 997 feet lower.
United States vs Idaho Population and History
Population
- United States has a population of 340,110,988 (2024), while Idaho has 2,001,619 (2024).
- United States' population is 169.9 times larger than Idaho's.
Population density
- United States: 96.3 people per square mile vs Idaho: 24.2.
- United States' population density is 4.0 times (298%) higher than Idaho's.
Biggest city
- United States's biggest city is New York with 8,478,072 people; Idaho's is Boise with 237,963.
- New York's population is 35.6 times larger than Boise's.
Largest metro area
- United States's largest metropolitan area is New York-Newark-Jersey City, NY-NJ metro area (19,940,274 people) vs Idaho's Boise City, ID metro area (845,877).
- New York-Newark-Jersey City, NY-NJ metro area's population is 23.6 times larger than Boise City, ID metro area's.
History
- United States: Declared independence on July 4, 1776.
- Idaho: Admitted to the Union on July 3, 1890, as the 43rd state.
- In its current form, United States is the older of the two by 114 years.
United States vs Idaho Economy
GDP
- United States's GDP is $30,769.7 billion (2025) vs Idaho's $129.0 billion.
- United States' economic output is 238.5 times larger than Idaho's.
GDP per capita
- United States: $89,599 per person vs Idaho: $64,457.
- United States' GDP per capita is 1.4 times (39%) higher than Idaho's.
Official Websites
United States official website · Idaho official website
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More Size Comparisons
All United States size comparisons · All Idaho size comparisons
Area, elevation and boundary figures come from official national statistics and US Census Bureau and Natural Earth boundary data; US state population, economic, county and tax figures come from the US Census Bureau, the Bureau of Economic Analysis and the Tax Foundation. Figures are rounded and for general reference.