The map above shows Massachusetts and United Kingdom side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Massachusetts vs United Kingdom Geography
Land area: Massachusetts has a land area of 7,801 square miles (20,204 km²), while United Kingdom has 93,410 square miles (241,930 km²). United Kingdom's land area is 12.0 times larger than Massachusetts'.
Total area: Massachusetts: 10,554 square miles (27,335 km²) vs United Kingdom: 94,058 square miles (243,610 km²), including inland and coastal water. United Kingdom's total area is 8.9 times (791%) larger than Massachusetts'.
Length: Massachusetts is 123 miles (198 km) long from north to south; United Kingdom is 747 miles (1,202 km). United Kingdom's north-south length is 6.1 times (507%) longer than Massachusetts'.
Width: Massachusetts spans 185 miles (297 km) east to west; United Kingdom spans 429 miles (690 km). United Kingdom's east-west width is 2.3 times (132%) wider than Massachusetts'.
Highest point: Massachusetts's highest point is Mount Greylock at 3,489 feet (1,063 m); United Kingdom's is Ben Nevis at 4,413 feet (1,345 m). Ben Nevis is 924 feet higher than Mount Greylock.
Lowest point: Massachusetts's lowest point is Atlantic Ocean at 0 feet; United Kingdom's is The Fens (Holme Fen) at -10 feet. United Kingdom's lowest point is 10 feet lower.
Massachusetts vs United Kingdom Population and History
Population: Massachusetts has a population of 7,136,171 (2024), while United Kingdom has 69,487,000 (2025). United Kingdom's population is 9.7 times (874%) larger than Massachusetts'.
Population density: Massachusetts: 914.8 people per square mile vs United Kingdom: 743.9. Massachusetts' population density is 1.2 times (23%) higher than United Kingdom's.
Biggest city: Massachusetts's biggest city is Boston with 673,458 people; United Kingdom's is London with 8,825,001. London's population is 13.1 times larger than Boston's.
Largest metro area: Massachusetts's largest metropolitan area is Boston-Cambridge-Newton, MA-NH metro area (5,025,517 people) vs United Kingdom's London (10,416,420). London's population is 2.1 times (107%) larger than Boston-Cambridge-Newton, MA-NH metro area's.
History: Massachusetts: Admitted to the Union on February 6, 1788, as the 6th state. United Kingdom: Formed as the United Kingdom of Great Britain and Ireland on January 1, 1801; took its current form in 1922. In its current form, Massachusetts is the older of the two by 13 years.
Massachusetts vs United Kingdom Economy
GDP: Massachusetts's GDP is $778.5 billion (2024) vs United Kingdom's $4,002.6 billion. United Kingdom's economic output is 5.1 times (414%) larger than Massachusetts'.
GDP per capita: Massachusetts: $109,095 per person vs United Kingdom: $57,602. Massachusetts' GDP per capita is 1.9 times (89%) higher than United Kingdom's.
Average income: Massachusetts: $93,607 vs United Kingdom: $54,550 average income per person (per capita personal income). Massachusetts' average income is 1.7 times (72%) higher than United Kingdom's.
Official Websites
Massachusetts official website · United Kingdom official website
More Size Comparisons
All Massachusetts size comparisons · All United Kingdom 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.