The map above shows United States and Ireland side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
United States vs Ireland Geography
Land area: United States has a land area of 3,533,467 square miles (9,151,637 km²), while Ireland has 26,596 square miles (68,883 km²). United States' land area is 132.9 times larger than Ireland's.
Total area: United States: 3,802,784 square miles (9,849,165 km²) vs Ireland: 27,133 square miles (70,273 km²), including inland and coastal water. United States' total area is 140.2 times larger than Ireland's.
Length: United States is 3,628 miles (5,839 km) long from north to south; Ireland is 287 miles (462 km). United States' north-south length is 12.6 times longer than Ireland's.
Width: United States spans 4,824 miles (7,763 km) east to west; Ireland spans 191 miles (308 km). United States' east-west width is 25.3 times wider than Ireland's.
Highest point: United States's highest point is Denali at 20,308 feet (6,190 m); Ireland's is Carrauntoohil at 3,406 feet (1,038 m). Denali is 16,902 feet higher than Carrauntoohil.
Lowest point: United States's lowest point is Death Valley at -279 feet; Ireland's is Atlantic Ocean at 0 feet. United States's lowest point is 279 feet lower.
United States vs Ireland Population and History
Population: United States has a population of 340,110,988 (2024), while Ireland has 5,525,600 (2026). United States' population is 61.6 times larger than Ireland's.
Population density: United States: 96.3 people per square mile vs Ireland: 207.8. Ireland's population density is 2.2 times (116%) higher than United States'.
Biggest city: United States's biggest city is New York with 8,478,072 people; Ireland's is Dublin with 592,713. New York's population is 14.3 times larger than Dublin's.
Largest metro area: United States's largest metropolitan area is New York-Newark-Jersey City, NY-NJ metro area (19,940,274 people) vs Ireland's Greater Dublin Area (2,082,605). New York-Newark-Jersey City, NY-NJ metro area's population is 9.6 times (857%) larger than Greater Dublin Area's.
History: United States: Declared independence on July 4, 1776. Ireland: Independent since December 6, 1922, as the Irish Free State; a republic since 1949. In its current form, United States is the older of the two by 146 years.
United States vs Ireland Economy
GDP: United States's GDP is $30,769.7 billion (2025) vs Ireland's $721.7 billion. United States' economic output is 42.6 times larger than Ireland's.
GDP per capita: United States: $89,599 per person vs Ireland: $131,593. Ireland's GDP per capita is 1.5 times (47%) higher than United States'.
Official Websites
United States official website · Ireland official website
More Size Comparisons
All United States size comparisons · All 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.