The map above shows Guam and Tasmania side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Guam vs Tasmania Geography
Land area: Guam has a land area of 210 square miles (544 km²), while Tasmania has 26,410 square miles (68,401 km²). Tasmania's land area is 125.7 times larger than Guam's.
Total area: Guam: 210 square miles (544 km²) vs Tasmania: 26,410 square miles (68,401 km²), including inland and coastal water. Tasmania's total area is 125.7 times larger than Guam's.
Length: Guam is 27 miles (43 km) long from north to south; Tasmania is 318 miles (511 km). Tasmania's north-south length is 11.8 times longer than Guam's.
Width: Guam spans 22 miles (35 km) east to west; Tasmania spans 248 miles (399 km). Tasmania's east-west width is 11.3 times wider than Guam's.
Highest point: Guam's highest point is Mount Lamlam at 1,332 feet (406 m); Tasmania's is Mount Ossa at 5,305 feet (1,617 m). Mount Ossa is 3,973 feet higher than Mount Lamlam.
Lowest point: Guam's lowest point is Pacific Ocean at 0 feet; Tasmania's is Southern Ocean at 0 feet. Both lowest points are at or near sea level.
Guam vs Tasmania Population and History
Population: Guam has a population of 153,836 (2020), while Tasmania has 576,659 (2025). Tasmania's population is 3.7 times (275%) larger than Guam's.
Population density: Guam: 732.6 people per square mile vs Tasmania: 21.8. Guam's population density is 33.6 times higher than Tasmania's.
History: Guam: A US territory since 1898. Tasmania: Became an Australian state at Federation on January 1, 1901; founded as a colony in 1825. In its current form, Guam is the older of the two by 3 years.
Official Websites
Guam official website · Tasmania official website
More Size Comparisons
All Guam size comparisons · All Tasmania 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.