The map above shows Massachusetts and Northern Ireland side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Massachusetts vs Northern Ireland Geography
Land area: Massachusetts has a land area of 7,801 square miles (20,204 km²), while Northern Ireland has 5,236 square miles (13,562 km²). Massachusetts' land area is 1.5 times (49%) larger than Northern Ireland's.
Total area: Massachusetts: 10,554 square miles (27,335 km²) vs Northern Ireland: 5,456 square miles (14,130 km²), including inland and coastal water. Massachusetts' total area is 1.9 times (93%) larger than Northern Ireland's.
Length: Massachusetts is 123 miles (198 km) long from north to south; Northern Ireland is 83 miles (134 km). Massachusetts' north-south length is 1.5 times (48%) longer than Northern Ireland's.
Width: Massachusetts spans 185 miles (297 km) east to west; Northern Ireland spans 107 miles (173 km). Massachusetts' east-west width is 1.7 times (73%) wider than Northern Ireland's.
Highest point: Massachusetts's highest point is Mount Greylock at 3,489 feet (1,063 m); Northern Ireland's is Slieve Donard at 2,789 feet (850 m). Mount Greylock is 700 feet higher than Slieve Donard.
Lowest point: Massachusetts'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.
Massachusetts vs Northern Ireland Population and History
Population: Massachusetts has a population of 7,136,171 (2024), while Northern Ireland has 1,905,000 (2022). Massachusetts' population is 3.7 times (275%) larger than Northern Ireland's.
Population density: Massachusetts: 914.8 people per square mile vs Northern Ireland: 363.8. Massachusetts' population density is 2.5 times (151%) higher than Northern Ireland's.
Biggest city: Massachusetts's biggest city is Boston with 673,458 people; Northern Ireland's is Belfast with 348,005. Boston's population is 1.9 times (94%) larger than Belfast's.
History: Massachusetts: Admitted to the Union on February 6, 1788, as the 6th state. Northern Ireland: A country within the United Kingdom; created by the partition of Ireland on May 3, 1921. In its current form, Massachusetts is the older of the two by 133 years.
Massachusetts vs Northern Ireland Economy
GDP: Massachusetts's GDP is $778.5 billion (2024) vs Northern Ireland's $58.8 billion. Massachusetts' economic output is 13.2 times larger than Northern Ireland's.
GDP per capita: Massachusetts: $109,095 per person vs Northern Ireland: $30,686. Massachusetts' GDP per capita is 3.6 times (256%) higher than Northern Ireland's.
Official Websites
Massachusetts official website · Northern Ireland official website
More Size Comparisons
All Massachusetts 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.