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
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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.