The map above shows Connecticut and Massachusetts side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Connecticut vs Massachusetts Geography
Land area
- Connecticut has a land area of 4,843 square miles (12,542 km²), while Massachusetts has 7,801 square miles (20,204 km²).
- Massachusetts' land area is 1.6 times (61%) larger than Connecticut's.
Total area
- Connecticut: 5,544 square miles (14,358 km²) vs Massachusetts: 10,554 square miles (27,335 km²), including inland and coastal water.
- Massachusetts' total area is 1.9 times (90%) larger than Connecticut's.
Length
- Connecticut is 73 miles (118 km) long from north to south; Massachusetts is 123 miles (198 km).
- Massachusetts' north-south length is 1.7 times (68%) longer than Connecticut's.
Width
- Connecticut spans 104 miles (167 km) east to west; Massachusetts spans 185 miles (297 km).
- Massachusetts' east-west width is 1.8 times (78%) wider than Connecticut's.
Highest point
- Connecticut's highest point is Mount Frissell (south slope) at 2,376 feet (724 m); Massachusetts's is Mount Greylock at 3,489 feet (1,063 m).
- Mount Greylock is 1,113 feet higher than Mount Frissell (south slope).
Lowest point
- Connecticut's lowest point is Long Island Sound at 0 feet; Massachusetts's is Atlantic Ocean at 0 feet.
- Both lowest points are at or near sea level.
Connecticut vs Massachusetts Population and History
Population
- Connecticut has a population of 3,675,069 (2024), while Massachusetts has 7,136,171 (2024).
- Massachusetts' population is 1.9 times (94%) larger than Connecticut's.
Population density
- Connecticut: 758.9 people per square mile vs Massachusetts: 914.8.
- Massachusetts' population density is 1.2 times (21%) higher than Connecticut's.
Biggest city
- Connecticut's biggest city is Bridgeport with 151,599 people; Massachusetts's is Boston with 673,458.
- Boston's population is 4.4 times (344%) larger than Bridgeport's.
Largest metro area
- Connecticut's largest metropolitan area is Hartford-West Hartford-East Hartford, CT metro area (1,169,048 people) vs Massachusetts's Boston-Cambridge-Newton, MA-NH metro area (5,025,517).
- Boston-Cambridge-Newton, MA-NH metro area's population is 4.3 times (330%) larger than Hartford-West Hartford-East Hartford, CT metro area's.
History
- Connecticut: Admitted to the Union on January 9, 1788, as the 5th state.
- Massachusetts: Admitted to the Union on February 6, 1788, as the 6th state.
Connecticut vs Massachusetts Economy
GDP
- Connecticut's GDP is $356.8 billion (2024) vs Massachusetts's $778.5 billion.
- Massachusetts' economic output is 2.2 times (118%) larger than Connecticut's.
GDP per capita
- Connecticut: $97,096 per person vs Massachusetts: $109,095.
- Massachusetts' GDP per capita is 1.1 times (12%) higher than Connecticut's.
Average income
- Connecticut: $95,067 vs Massachusetts: $93,607 average income per person (per capita personal income).
- Connecticut and Massachusetts have about the same average income.
Connecticut vs Massachusetts Counties
Number of counties
- Connecticut has 9 counties, while Massachusetts has 14.
- Massachusetts' county count is 1.6 times (56%) higher than Connecticut's.
Biggest county by area
- Connecticut's largest county is Capitol Planning Region at 1,027 square miles; Massachusetts's is Worcester County at 1,511 square miles.
- Worcester County's land area is 1.5 times (47%) larger than Capitol Planning Region's.
Smallest county by area
- Connecticut: Greater Bridgeport Planning Region (140 sq mi) vs Massachusetts: Nantucket County (46 sq mi).
- Greater Bridgeport Planning Region's land area is 3.0 times (203%) larger than Nantucket County's.
Most populous county
- Connecticut: Capitol Planning Region (991,508 people) vs Massachusetts: Middlesex County (1,668,956 people).
- Middlesex County's population is 1.7 times (68%) larger than Capitol Planning Region's.
Least populous county
- Connecticut: Northeastern Connecticut Planning Region (97,701 people) vs Massachusetts: Nantucket County (14,670 people).
- Northeastern Connecticut Planning Region's population is 6.7 times (566%) larger than Nantucket County's.
Richest county
- Connecticut: Western Connecticut Planning Region ($165,513 per capita income) vs Massachusetts: Nantucket County ($129,250).
- Western Connecticut Planning Region's income is 1.3 times (28%) richer than Nantucket County's.
Poorest county
- Connecticut: Southeastern Connecticut Planning Region ($64,845 per capita income) vs Massachusetts: Hampshire County ($65,432).
- Southeastern Connecticut Planning Region and Hampshire County have about the same income.
Connecticut vs Massachusetts Taxes
State income tax
- Connecticut has a top income tax rate of 6.99%, while Massachusetts has a top income tax rate of 9%.
- Massachusetts's top rate is 2.01 percentage points higher.
Property tax
- Connecticut: 1.66% effective rate vs Massachusetts: 1% of home value per year.
- Connecticut's rate is 0.66 percentage points higher.
Sales tax
- Connecticut: 6.35% combined state and average local rate vs Massachusetts: 6.25%.
- Connecticut's combined rate is 0.1 percentage points higher.
Official Websites
Connecticut official website · Massachusetts official website
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More Size Comparisons
All Connecticut 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.