The map above shows Puerto Rico and Northern Ireland side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Puerto Rico vs Northern Ireland Geography
Land area: Puerto Rico has a land area of 3,424 square miles (8,868 km²), while Northern Ireland has 5,236 square miles (13,562 km²). Northern Ireland's land area is 1.5 times (53%) larger than Puerto Rico's.
Total area: Puerto Rico: 3,515 square miles (9,104 km²) vs Northern Ireland: 5,456 square miles (14,130 km²), including inland and coastal water. Northern Ireland's total area is 1.6 times (55%) larger than Puerto Rico's.
Length: Puerto Rico is 67 miles (107 km) long from north to south; Northern Ireland is 83 miles (134 km). Northern Ireland's north-south length is 1.2 times (24%) longer than Puerto Rico's.
Width: Puerto Rico spans 174 miles (279 km) east to west; Northern Ireland spans 107 miles (173 km). Puerto Rico's east-west width is 1.6 times (63%) wider than Northern Ireland's.
Highest point: Puerto Rico's highest point is Cerro de Punta at 4,390 feet (1,338 m); Northern Ireland's is Slieve Donard at 2,789 feet (850 m). Cerro de Punta is 1,601 feet higher than Slieve Donard.
Lowest point: Puerto Rico's lowest point is Atlantic Ocean at 0 feet; Northern Ireland's is Irish Sea at 0 feet. Both lowest points are at or near sea level.
Puerto Rico vs Northern Ireland Population and History
Population: Puerto Rico has a population of 3,285,874 (2020), while Northern Ireland has 1,905,000 (2022). Puerto Rico's population is 1.7 times (72%) larger than Northern Ireland's.
Population density: Puerto Rico: 959.7 people per square mile vs Northern Ireland: 363.8. Puerto Rico's population density is 2.6 times (164%) higher than Northern Ireland's.
Biggest city: Puerto Rico's biggest city is San Juan with 342,259 people; Northern Ireland's is Belfast with 348,005. San Juan and Belfast have about the same population.
History: Puerto Rico: A US territory since 1898; a commonwealth since 1952. Northern Ireland: A country within the United Kingdom; created by the partition of Ireland on May 3, 1921. In its current form, Puerto Rico is the older of the two by 23 years.
Puerto Rico vs Northern Ireland Economy
GDP: Puerto Rico's GDP is $129.0 billion (2025) vs Northern Ireland's $58.8 billion. Puerto Rico's economic output is 2.2 times (119%) larger than Northern Ireland's.
GDP per capita: Puerto Rico: $40,650 per person vs Northern Ireland: $30,686. Puerto Rico's GDP per capita is 1.3 times (32%) higher than Northern Ireland's.
Official Websites
Puerto Rico official website · Northern Ireland official website
More Size Comparisons
All Puerto Rico 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.