The map above shows Idaho and Northern Ireland side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Idaho vs Northern Ireland Geography
Land area: Idaho has a land area of 82,645 square miles (214,051 km²), while Northern Ireland has 5,236 square miles (13,562 km²). Idaho's land area is 15.8 times larger than Northern Ireland's.
Total area: Idaho: 83,569 square miles (216,441 km²) vs Northern Ireland: 5,456 square miles (14,130 km²), including inland and coastal water. Idaho's total area is 15.3 times larger than Northern Ireland's.
Length: Idaho is 483 miles (778 km) long from north to south; Northern Ireland is 83 miles (134 km). Idaho's north-south length is 5.8 times (482%) longer than Northern Ireland's.
Width: Idaho spans 352 miles (566 km) east to west; Northern Ireland spans 107 miles (173 km). Idaho's east-west width is 3.3 times (229%) wider than Northern Ireland's.
Highest point: Idaho's highest point is Borah Peak at 12,631 feet (3,850 m); Northern Ireland's is Slieve Donard at 2,789 feet (850 m). Borah Peak is 9,842 feet higher than Slieve Donard.
Lowest point: Idaho's lowest point is Snake River at 718 feet; Northern Ireland's is Irish Sea at 0 feet. Northern Ireland's lowest point is 718 feet lower.
Idaho vs Northern Ireland Population and History
Population: Idaho has a population of 2,001,619 (2024), while Northern Ireland has 1,905,000 (2022). Idaho's population is 1.1 times (5%) larger than Northern Ireland's.
Population density: Idaho: 24.2 people per square mile vs Northern Ireland: 363.8. Northern Ireland's population density is 15.0 times higher than Idaho's.
Biggest city: Idaho's biggest city is Boise with 237,963 people; Northern Ireland's is Belfast with 348,005. Belfast's population is 1.5 times (46%) larger than Boise's.
History: Idaho: Admitted to the Union on July 3, 1890, as the 43rd state. Northern Ireland: A country within the United Kingdom; created by the partition of Ireland on May 3, 1921. In its current form, Idaho is the older of the two by 31 years.
Idaho vs Northern Ireland Economy
GDP: Idaho's GDP is $129.0 billion (2024) vs Northern Ireland's $58.8 billion. Idaho's economic output is 2.2 times (119%) larger than Northern Ireland's.
GDP per capita: Idaho: $64,457 per person vs Northern Ireland: $30,686. Idaho's GDP per capita is 2.1 times (110%) higher than Northern Ireland's.
Official Websites
Idaho official website · Northern Ireland official website
More Size Comparisons
All Idaho 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.