The map above shows Montana and Australian Capital Territory side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Montana vs Australian Capital Territory Geography
Land area: Montana has a land area of 145,550 square miles (376,973 km²), while Australian Capital Territory has 910 square miles (2,358 km²). Montana's land area is 159.9 times larger than Australian Capital Territory's.
Total area: Montana: 147,043 square miles (380,840 km²) vs Australian Capital Territory: 910 square miles (2,358 km²), including inland and coastal water. Montana's total area is 161.5 times larger than Australian Capital Territory's.
Length: Montana is 319 miles (514 km) long from north to south; Australian Capital Territory is 54 miles (87 km). Montana's north-south length is 5.9 times (491%) longer than Australian Capital Territory's.
Width: Montana spans 607 miles (976 km) east to west; Australian Capital Territory spans 38 miles (61 km). Montana's east-west width is 16.0 times wider than Australian Capital Territory's.
Highest point: Montana's highest point is Granite Peak at 12,767 feet (3,891 m); Australian Capital Territory's is Bimberi Peak at 6,273 feet (1,912 m). Granite Peak is 6,494 feet higher than Bimberi Peak.
Lowest point: Montana's lowest point is Kootenai River at 1,805 feet; Australian Capital Territory's is Molonglo River at 1,407 feet. Australian Capital Territory's lowest point is 398 feet lower.
Montana vs Australian Capital Territory Population and History
Population: Montana has a population of 1,137,233 (2024), while Australian Capital Territory has 486,231 (2025). Montana's population is 2.3 times (134%) larger than Australian Capital Territory's.
Population density: Montana: 7.8 people per square mile vs Australian Capital Territory: 534.3. Australian Capital Territory's population density is 68.5 times higher than Montana's.
Largest metro area: Montana's largest metropolitan area is Billings, MT metro area (192,531 people) vs Australian Capital Territory's Greater Canberra (486,231). Greater Canberra's population is 2.5 times (153%) larger than Billings, MT metro area's.
History: Montana: Admitted to the Union on November 8, 1889, as the 41st state. Australian Capital Territory: Established as the Federal Capital Territory on January 1, 1911. In its current form, Montana is the older of the two by 22 years.
Montana vs Australian Capital Territory Economy
GDP: Montana's GDP is $78.4 billion (2024) vs Australian Capital Territory's $38.0 billion. Montana's economic output is 2.1 times (106%) larger than Australian Capital Territory's.
GDP per capita: Montana: $68,975 per person vs Australian Capital Territory: $78,152. Australian Capital Territory's GDP per capita is 1.1 times (13%) higher than Montana's.
Official Websites
Montana official website · Australian Capital Territory official website
More Size Comparisons
All Montana 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.