The map above shows Guam and Northern Mariana Islands side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Guam vs Northern Mariana Islands Geography
Land area: Guam has a land area of 210 square miles (544 km²), while Northern Mariana Islands has 179 square miles (464 km²). Guam's land area is 1.2 times (17%) larger than Northern Mariana Islands'.
Total area: Guam: 210 square miles (544 km²) vs Northern Mariana Islands: 179 square miles (464 km²), including inland and coastal water. Guam's total area is 1.2 times (17%) larger than Northern Mariana Islands'.
Length: Guam is 27 miles (43 km) long from north to south; Northern Mariana Islands is 326 miles (524 km). Northern Mariana Islands' north-south length is 12.1 times longer than Guam's.
Width: Guam spans 22 miles (35 km) east to west; Northern Mariana Islands spans 278 miles (448 km). Northern Mariana Islands' east-west width is 12.6 times wider than Guam's.
Highest point: Guam's highest point is Mount Lamlam at 1,332 feet (406 m); Northern Mariana Islands's is Agrihan at 3,166 feet (965 m). Agrihan is 1,834 feet higher than Mount Lamlam.
Lowest point: Guam's lowest point is Pacific Ocean at 0 feet; Northern Mariana Islands's is Pacific Ocean at 0 feet. Both lowest points are at or near sea level.
Guam vs Northern Mariana Islands Population and History
Population: Guam has a population of 153,836 (2020), while Northern Mariana Islands has 47,329 (2020). Guam's population is 3.3 times (225%) larger than Northern Mariana Islands'.
Population density: Guam: 732.6 people per square mile vs Northern Mariana Islands: 264.4. Guam's population density is 2.8 times (177%) higher than Northern Mariana Islands'.
History: Guam: A US territory since 1898. Northern Mariana Islands: A US commonwealth since 1978. In its current form, Guam is the older of the two by 80 years.
Official Websites
Guam official website · Northern Mariana Islands official website
More Size Comparisons
All Guam size comparisons · All Northern Mariana Islands 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.