The map above shows New Jersey and Ireland side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
New Jersey vs Ireland Geography
Land area: New Jersey has a land area of 7,355 square miles (19,049 km²), while Ireland has 26,596 square miles (68,883 km²). Ireland's land area is 3.6 times (262%) larger than New Jersey's.
Total area: New Jersey: 8,719 square miles (22,583 km²) vs Ireland: 27,133 square miles (70,273 km²), including inland and coastal water. Ireland's total area is 3.1 times (211%) larger than New Jersey's.
Length: New Jersey is 169 miles (271 km) long from north to south; Ireland is 287 miles (462 km). Ireland's north-south length is 1.7 times (70%) longer than New Jersey's.
Width: New Jersey spans 129 miles (207 km) east to west; Ireland spans 191 miles (308 km). Ireland's east-west width is 1.5 times (48%) wider than New Jersey's.
Highest point: New Jersey's highest point is High Point at 1,798 feet (548 m); Ireland's is Carrauntoohil at 3,406 feet (1,038 m). Carrauntoohil is 1,608 feet higher than High Point.
Lowest point: New Jersey's lowest point is Atlantic Ocean at 0 feet; Ireland's is Atlantic Ocean at 0 feet. Both lowest points are at or near sea level.
New Jersey vs Ireland Population and History
Population: New Jersey has a population of 9,500,851 (2024), while Ireland has 5,525,600 (2026). New Jersey's population is 1.7 times (72%) larger than Ireland's.
Population density: New Jersey: 1,291.8 people per square mile vs Ireland: 207.8. New Jersey's population density is 6.2 times (522%) higher than Ireland's.
Biggest city: New Jersey's biggest city is Newark with 317,303 people; Ireland's is Dublin with 592,713. Dublin's population is 1.9 times (87%) larger than Newark's.
Largest metro area: New Jersey'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: New Jersey: Admitted to the Union on December 18, 1787, as the 3rd state. Ireland: Independent since December 6, 1922, as the Irish Free State; a republic since 1949. In its current form, New Jersey is the older of the two by 135 years.
New Jersey vs Ireland Economy
GDP: New Jersey's GDP is $846.0 billion (2024) vs Ireland's $721.7 billion. New Jersey's economic output is 1.2 times (17%) larger than Ireland's.
GDP per capita: New Jersey: $89,045 per person vs Ireland: $131,593. Ireland's GDP per capita is 1.5 times (48%) higher than New Jersey's.
Average income: New Jersey: $84,893 vs Ireland: $87,360 average income per person (per capita personal income). New Jersey and Ireland have about the same average income.
Official Websites
New Jersey official website · Ireland official website
More Size Comparisons
All New Jersey 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.