The map above shows Montana and Northern Ireland side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Montana vs Northern Ireland Geography
Land area: Montana has a land area of 145,550 square miles (376,973 km²), while Northern Ireland has 5,236 square miles (13,562 km²). Montana's land area is 27.8 times larger than Northern Ireland's.
Total area: Montana: 147,043 square miles (380,840 km²) vs Northern Ireland: 5,456 square miles (14,130 km²), including inland and coastal water. Montana's total area is 27.0 times larger than Northern Ireland's.
Length: Montana is 319 miles (514 km) long from north to south; Northern Ireland is 83 miles (134 km). Montana's north-south length is 3.8 times (284%) longer than Northern Ireland's.
Width: Montana spans 607 miles (976 km) east to west; Northern Ireland spans 107 miles (173 km). Montana's east-west width is 5.7 times (467%) wider than Northern Ireland's.
Highest point: Montana's highest point is Granite Peak at 12,767 feet (3,891 m); Northern Ireland's is Slieve Donard at 2,789 feet (850 m). Granite Peak is 9,978 feet higher than Slieve Donard.
Lowest point: Montana's lowest point is Kootenai River at 1,805 feet; Northern Ireland's is Irish Sea at 0 feet. Northern Ireland's lowest point is 1,805 feet lower.
Montana vs Northern Ireland Population and History
Population: Montana has a population of 1,137,233 (2024), while Northern Ireland has 1,905,000 (2022). Northern Ireland's population is 1.7 times (68%) larger than Montana's.
Population density: Montana: 7.8 people per square mile vs Northern Ireland: 363.8. Northern Ireland's population density is 46.6 times higher than Montana's.
Biggest city: Montana's biggest city is Billings with 121,483 people; Northern Ireland's is Belfast with 348,005. Belfast's population is 2.9 times (186%) larger than Billings'.
History: Montana: Admitted to the Union on November 8, 1889, as the 41st state. Northern Ireland: A country within the United Kingdom; created by the partition of Ireland on May 3, 1921. In its current form, Montana is the older of the two by 32 years.
Montana vs Northern Ireland Economy
GDP: Montana's GDP is $78.4 billion (2024) vs Northern Ireland's $58.8 billion. Montana's economic output is 1.3 times (33%) larger than Northern Ireland's.
GDP per capita: Montana: $68,975 per person vs Northern Ireland: $30,686. Montana's GDP per capita is 2.2 times (125%) higher than Northern Ireland's.
Official Websites
Montana official website · Northern Ireland official website
More Size Comparisons
All Montana size comparisons · All Northern Ireland 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.