The map above shows Illinois and Guam side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Illinois vs Guam Geography
Land area
- Illinois has a land area of 55,513 square miles (143,778 km²), while Guam has 210 square miles (544 km²).
- Illinois' land area is 264.3 times larger than Guam's.
Total area
- Illinois: 57,913 square miles (149,995 km²) vs Guam: 210 square miles (544 km²), including inland and coastal water.
- Illinois' total area is 275.7 times larger than Guam's.
Length
- Illinois is 390 miles (628 km) long from north to south; Guam is 27 miles (43 km).
- Illinois' north-south length is 14.4 times longer than Guam's.
Width
- Illinois spans 283 miles (456 km) east to west; Guam spans 22 miles (35 km).
- Illinois' east-west width is 12.9 times wider than Guam's.
Highest point
- Illinois's highest point is Charles Mound at 1,232 feet (376 m); Guam's is Mount Lamlam at 1,332 feet (406 m).
- Mount Lamlam is 100 feet higher than Charles Mound.
Lowest point
- Illinois's lowest point is Mississippi River at 292 feet; Guam's is Pacific Ocean at 0 feet.
- Guam's lowest point is 292 feet lower.
Illinois vs Guam Population and History
Population
- Illinois has a population of 12,710,158 (2024), while Guam has 153,836 (2020).
- Illinois' population is 82.6 times larger than Guam's.
Population density
- Illinois: 229.0 people per square mile vs Guam: 732.6.
- Guam's population density is 3.2 times (220%) higher than Illinois'.
History
- Illinois: Admitted to the Union on December 3, 1818, as the 21st state.
- Guam: A US territory since 1898.
- In its current form, Illinois is the older of the two by 80 years.
Official Websites
Illinois official website · Guam official website
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More Size Comparisons
All Illinois 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.