The map above shows California and Guam side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
California vs Guam Geography
Land area: California has a land area of 155,859 square miles (403,673 km²), while Guam has 210 square miles (544 km²). California's land area is 742.0 times larger than Guam's.
Total area: California: 163,694 square miles (423,965 km²) vs Guam: 210 square miles (544 km²), including inland and coastal water. California's total area is 779.3 times larger than Guam's.
Length: California is 761 miles (1,224 km) long from north to south; Guam is 27 miles (43 km). California's north-south length is 28.2 times longer than Guam's.
Width: California spans 706 miles (1,137 km) east to west; Guam spans 22 miles (35 km). California's east-west width is 32.1 times wider than Guam's.
Highest point: California's highest point is Mount Whitney at 14,484 feet (4,415 m); Guam's is Mount Lamlam at 1,332 feet (406 m). Mount Whitney is 13,152 feet higher than Mount Lamlam.
Lowest point: California's lowest point is Death Valley at -279 feet; Guam's is Pacific Ocean at 0 feet. California's lowest point is 279 feet lower.
California vs Guam Population and History
Population: California has a population of 39,431,263 (2024), while Guam has 153,836 (2020). California's population is 256.3 times larger than Guam's.
Population density: California: 253.0 people per square mile vs Guam: 732.6. Guam's population density is 2.9 times (190%) higher than California's.
History: California: Admitted to the Union on September 9, 1850, as the 31st state. Guam: A US territory since 1898. In its current form, California is the older of the two by 48 years.
Official Websites
California official website · Guam official website
More Size Comparisons
All California 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.