The map above shows Pennsylvania and Ireland side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Pennsylvania vs Ireland Geography
Land area: Pennsylvania has a land area of 44,742 square miles (115,882 km²), while Ireland has 26,596 square miles (68,883 km²). Pennsylvania's land area is 1.7 times (68%) larger than Ireland's.
Total area: Pennsylvania: 46,054 square miles (119,279 km²) vs Ireland: 27,133 square miles (70,273 km²), including inland and coastal water. Pennsylvania's total area is 1.7 times (70%) larger than Ireland's.
Length: Pennsylvania is 284 miles (458 km) long from north to south; Ireland is 287 miles (462 km). Pennsylvania and Ireland have about the same north-south length.
Width: Pennsylvania spans 307 miles (495 km) east to west; Ireland spans 191 miles (308 km). Pennsylvania's east-west width is 1.6 times (61%) wider than Ireland's.
Highest point: Pennsylvania's highest point is Mount Davis at 3,210 feet (978 m); Ireland's is Carrauntoohil at 3,406 feet (1,038 m). Carrauntoohil is 196 feet higher than Mount Davis.
Lowest point: Pennsylvania's lowest point is Delaware River at 0 feet; Ireland's is Atlantic Ocean at 0 feet. Both lowest points are at or near sea level.
Pennsylvania vs Ireland Population and History
Population: Pennsylvania has a population of 13,078,751 (2024), while Ireland has 5,525,600 (2026). Pennsylvania's population is 2.4 times (137%) larger than Ireland's.
Population density: Pennsylvania: 292.3 people per square mile vs Ireland: 207.8. Pennsylvania's population density is 1.4 times (41%) higher than Ireland's.
Biggest city: Pennsylvania's biggest city is Philadelphia with 1,573,916 people; Ireland's is Dublin with 592,713. Philadelphia's population is 2.7 times (166%) larger than Dublin's.
Largest metro area: Pennsylvania's largest metropolitan area is Philadelphia-Camden-Wilmington, PA-NJ-DE-MD metro area (6,330,422 people) vs Ireland's Greater Dublin Area (2,082,605). Philadelphia-Camden-Wilmington, PA-NJ-DE-MD metro area's population is 3.0 times (204%) larger than Greater Dublin Area's.
History: Pennsylvania: Admitted to the Union on December 12, 1787, as the 2nd state. Ireland: Independent since December 6, 1922, as the Irish Free State; a republic since 1949. In its current form, Pennsylvania is the older of the two by 135 years.
Pennsylvania vs Ireland Economy
GDP: Pennsylvania's GDP is $1,007.9 billion (2024) vs Ireland's $721.7 billion. Pennsylvania's economic output is 1.4 times (40%) larger than Ireland's.
GDP per capita: Pennsylvania: $77,062 per person vs Ireland: $131,593. Ireland's GDP per capita is 1.7 times (71%) higher than Pennsylvania's.
Average income: Pennsylvania: $70,678 vs Ireland: $87,360 average income per person (per capita personal income). Ireland's average income is 1.2 times (24%) higher than Pennsylvania's.
Official Websites
Pennsylvania official website · Ireland official website
More Size Comparisons
All Pennsylvania 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.