The map above shows Colorado and Massachusetts side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Colorado vs Massachusetts Geography
Land area: Colorado has a land area of 103,637 square miles (268,419 km²), while Massachusetts has 7,801 square miles (20,204 km²). Colorado's land area is 13.3 times larger than Massachusetts'.
Total area: Colorado: 104,095 square miles (269,605 km²) vs Massachusetts: 10,554 square miles (27,335 km²), including inland and coastal water. Colorado's total area is 9.9 times (886%) larger than Massachusetts'.
Length: Colorado is 467 miles (751 km) long from north to south; Massachusetts is 123 miles (198 km). Colorado's north-south length is 3.8 times (280%) longer than Massachusetts'.
Width: Colorado spans 387 miles (622 km) east to west; Massachusetts spans 185 miles (297 km). Colorado's east-west width is 2.1 times (109%) wider than Massachusetts'.
Highest point: Colorado's highest point is Mount Elbert at 14,422 feet (4,396 m); Massachusetts's is Mount Greylock at 3,489 feet (1,063 m). Mount Elbert is 10,933 feet higher than Mount Greylock.
Lowest point: Colorado's lowest point is Arikaree River at 3,326 feet; Massachusetts's is Atlantic Ocean at 0 feet. Massachusetts's lowest point is 3,326 feet lower.
Colorado vs Massachusetts Population and History
Population: Colorado has a population of 5,957,493 (2024), while Massachusetts has 7,136,171 (2024). Massachusetts' population is 1.2 times (20%) larger than Colorado's.
Population density: Colorado: 57.5 people per square mile vs Massachusetts: 914.8. Massachusetts' population density is 15.9 times higher than Colorado's.
Biggest city: Colorado's biggest city is Denver with 729,019 people; Massachusetts's is Boston with 673,458. Denver's population is 1.1 times (8%) larger than Boston's.
Largest metro area: Colorado's largest metropolitan area is Denver-Aurora-Centennial, CO metro area (3,052,498 people) vs Massachusetts's Boston-Cambridge-Newton, MA-NH metro area (5,025,517). Boston-Cambridge-Newton, MA-NH metro area's population is 1.6 times (65%) larger than Denver-Aurora-Centennial, CO metro area's.
History: Colorado: Admitted to the Union on August 1, 1876, as the 38th state. Massachusetts: Admitted to the Union on February 6, 1788, as the 6th state. In its current form, Massachusetts is the older of the two by 88 years.
Colorado vs Massachusetts Economy
GDP: Colorado's GDP is $557.6 billion (2024) vs Massachusetts's $778.5 billion. Massachusetts' economic output is 1.4 times (40%) larger than Colorado's.
GDP per capita: Colorado: $93,602 per person vs Massachusetts: $109,095. Massachusetts' GDP per capita is 1.2 times (17%) higher than Colorado's.
Average income: Colorado: $83,055 vs Massachusetts: $93,607 average income per person (per capita personal income). Massachusetts' average income is 1.1 times (13%) higher than Colorado's.
Colorado vs Massachusetts Counties
Number of counties: Colorado has 64 counties, while Massachusetts has 14. Colorado's county count is 4.6 times (357%) higher than Massachusetts'.
Biggest county by area: Colorado's largest county is Las Animas County at 4,773 square miles; Massachusetts's is Worcester County at 1,511 square miles. Las Animas County's land area is 3.2 times (216%) larger than Worcester County's.
Smallest county by area: Colorado: Broomfield County (33 sq mi) vs Massachusetts: Nantucket County (46 sq mi). Nantucket County's land area is 1.4 times (40%) larger than Broomfield County's.
Most populous county: Colorado: El Paso County (752,772 people) vs Massachusetts: Middlesex County (1,668,956 people). Middlesex County's population is 2.2 times (122%) larger than El Paso County's.
Least populous county: Colorado: Hinsdale County (747 people) vs Massachusetts: Nantucket County (14,670 people). Nantucket County's population is 19.6 times larger than Hinsdale County's.
Richest county: Colorado: Pitkin County ($275,044 per capita income) vs Massachusetts: Nantucket County ($129,250). Pitkin County's income is 2.1 times (113%) richer than Nantucket County's.
Poorest county: Colorado: Crowley County ($27,232 per capita income) vs Massachusetts: Hampshire County ($65,432). Hampshire County's income is 2.4 times (140%) richer than Crowley County's.
Colorado vs Massachusetts Taxes
State income tax: Colorado has a top income tax rate of 4.4%, while Massachusetts has a top income tax rate of 9%. Massachusetts's top rate is 4.6 percentage points higher.
Property tax: Colorado: 0.49% effective rate vs Massachusetts: 1% of home value per year. Massachusetts's rate is 0.51 percentage points higher.
Sales tax: Colorado: 7.89% combined state and average local rate vs Massachusetts: 6.25%. Colorado's combined rate is 1.64 percentage points higher.
Official Websites
Colorado official website · Massachusetts official website
More Size Comparisons
All Colorado size comparisons · All Massachusetts 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.