The map above shows Idaho and Guam side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Idaho vs Guam Geography
Land area: Idaho has a land area of 82,645 square miles (214,051 km²), while Guam has 210 square miles (544 km²). Idaho's land area is 393.5 times larger than Guam's.
Total area: Idaho: 83,569 square miles (216,441 km²) vs Guam: 210 square miles (544 km²), including inland and coastal water. Idaho's total area is 397.9 times larger than Guam's.
Length: Idaho is 483 miles (778 km) long from north to south; Guam is 27 miles (43 km). Idaho's north-south length is 17.9 times longer than Guam's.
Width: Idaho spans 352 miles (566 km) east to west; Guam spans 22 miles (35 km). Idaho's east-west width is 16.0 times wider than Guam's.
Highest point: Idaho's highest point is Borah Peak at 12,631 feet (3,850 m); Guam's is Mount Lamlam at 1,332 feet (406 m). Borah Peak is 11,299 feet higher than Mount Lamlam.
Lowest point: Idaho's lowest point is Snake River at 718 feet; Guam's is Pacific Ocean at 0 feet. Guam's lowest point is 718 feet lower.
Idaho vs Guam Population and History
Population: Idaho has a population of 2,001,619 (2024), while Guam has 153,836 (2020). Idaho's population is 13.0 times larger than Guam's.
Population density: Idaho: 24.2 people per square mile vs Guam: 732.6. Guam's population density is 30.3 times higher than Idaho's.
History: Idaho: Admitted to the Union on July 3, 1890, as the 43rd state. Guam: A US territory since 1898. In its current form, Idaho is the older of the two by 8 years.
Official Websites
Idaho official website · Guam official website
More Size Comparisons
All Idaho size comparisons · All Guam 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.