The map above shows Northern Mariana Islands and Australian Capital Territory side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Northern Mariana Islands vs Australian Capital Territory Geography
Land area: Northern Mariana Islands has a land area of 179 square miles (464 km²), while Australian Capital Territory has 910 square miles (2,358 km²). Australian Capital Territory's land area is 5.1 times (408%) larger than Northern Mariana Islands'.
Total area: Northern Mariana Islands: 179 square miles (464 km²) vs Australian Capital Territory: 910 square miles (2,358 km²), including inland and coastal water. Australian Capital Territory's total area is 5.1 times (408%) larger than Northern Mariana Islands'.
Length: Northern Mariana Islands is 326 miles (524 km) long from north to south; Australian Capital Territory is 54 miles (87 km). Northern Mariana Islands' north-south length is 6.0 times (504%) longer than Australian Capital Territory's.
Width: Northern Mariana Islands spans 278 miles (448 km) east to west; Australian Capital Territory spans 38 miles (61 km). Northern Mariana Islands' east-west width is 7.3 times (632%) wider than Australian Capital Territory's.
Highest point: Northern Mariana Islands's highest point is Agrihan at 3,166 feet (965 m); Australian Capital Territory's is Bimberi Peak at 6,273 feet (1,912 m). Bimberi Peak is 3,107 feet higher than Agrihan.
Lowest point: Northern Mariana Islands's lowest point is Pacific Ocean at 0 feet; Australian Capital Territory's is Molonglo River at 1,407 feet. Northern Mariana Islands's lowest point is 1,407 feet lower.
Northern Mariana Islands vs Australian Capital Territory Population and History
Population: Northern Mariana Islands has a population of 47,329 (2020), while Australian Capital Territory has 486,231 (2025). Australian Capital Territory's population is 10.3 times larger than Northern Mariana Islands'.
Population density: Northern Mariana Islands: 264.4 people per square mile vs Australian Capital Territory: 534.3. Australian Capital Territory's population density is 2.0 times (102%) higher than Northern Mariana Islands'.
History: Northern Mariana Islands: A US commonwealth since 1978. Australian Capital Territory: Established as the Federal Capital Territory on January 1, 1911. In its current form, Australian Capital Territory is the older of the two by 67 years.
Official Websites
Northern Mariana Islands official website · Australian Capital Territory official website
More Size Comparisons
All Northern Mariana Islands size comparisons · All Australian Capital Territory 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.