The map above shows Northern Mariana Islands and Puerto Rico side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Northern Mariana Islands vs Puerto Rico Geography
Land area: Northern Mariana Islands has a land area of 179 square miles (464 km²), while Puerto Rico has 3,424 square miles (8,868 km²). Puerto Rico's land area is 19.1 times larger than Northern Mariana Islands'.
Total area: Northern Mariana Islands: 179 square miles (464 km²) vs Puerto Rico: 3,515 square miles (9,104 km²), including inland and coastal water. Puerto Rico's total area is 19.6 times larger than Northern Mariana Islands'.
Length: Northern Mariana Islands is 326 miles (524 km) long from north to south; Puerto Rico is 67 miles (107 km). Northern Mariana Islands' north-south length is 4.9 times (387%) longer than Puerto Rico's.
Width: Northern Mariana Islands spans 278 miles (448 km) east to west; Puerto Rico spans 174 miles (279 km). Northern Mariana Islands' east-west width is 1.6 times (60%) wider than Puerto Rico's.
Highest point: Northern Mariana Islands's highest point is Agrihan at 3,166 feet (965 m); Puerto Rico's is Cerro de Punta at 4,390 feet (1,338 m). Cerro de Punta is 1,224 feet higher than Agrihan.
Lowest point: Northern Mariana Islands's lowest point is Pacific Ocean at 0 feet; Puerto Rico's is Atlantic Ocean at 0 feet. Both lowest points are at or near sea level.
Northern Mariana Islands vs Puerto Rico Population and History
Population: Northern Mariana Islands has a population of 47,329 (2020), while Puerto Rico has 3,285,874 (2020). Puerto Rico's population is 69.4 times larger than Northern Mariana Islands'.
Population density: Northern Mariana Islands: 264.4 people per square mile vs Puerto Rico: 959.7. Puerto Rico's population density is 3.6 times (263%) higher than Northern Mariana Islands'.
History: Northern Mariana Islands: A US commonwealth since 1978. Puerto Rico: A US territory since 1898; a commonwealth since 1952. In its current form, Puerto Rico is the older of the two by 80 years.
Official Websites
Northern Mariana Islands official website · Puerto Rico official website
More Size Comparisons
All Northern Mariana Islands size comparisons · All Puerto Rico 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.