The map above shows Connecticut and New Jersey side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Connecticut vs New Jersey Geography
Land area: Connecticut has a land area of 4,843 square miles (12,542 km²), while New Jersey has 7,355 square miles (19,049 km²). New Jersey's land area is 1.5 times (52%) larger than Connecticut's.
Total area: Connecticut: 5,544 square miles (14,358 km²) vs New Jersey: 8,719 square miles (22,583 km²), including inland and coastal water. New Jersey's total area is 1.6 times (57%) larger than Connecticut's.
Length: Connecticut is 73 miles (118 km) long from north to south; New Jersey is 169 miles (271 km). New Jersey's north-south length is 2.3 times (132%) longer than Connecticut's.
Width: Connecticut spans 104 miles (167 km) east to west; New Jersey spans 129 miles (207 km). New Jersey's east-west width is 1.2 times (24%) wider than Connecticut's.
Highest point: Connecticut's highest point is Mount Frissell (south slope) at 2,376 feet (724 m); New Jersey's is High Point at 1,798 feet (548 m). Mount Frissell (south slope) is 578 feet higher than High Point.
Lowest point: Connecticut's lowest point is Long Island Sound at 0 feet; New Jersey's is Atlantic Ocean at 0 feet. Both lowest points are at or near sea level.
Connecticut vs New Jersey Population and History
Population: Connecticut has a population of 3,675,069 (2024), while New Jersey has 9,500,851 (2024). New Jersey's population is 2.6 times (159%) larger than Connecticut's.
Population density: Connecticut: 758.9 people per square mile vs New Jersey: 1,291.8. New Jersey's population density is 1.7 times (70%) higher than Connecticut's.
Biggest city: Connecticut's biggest city is Bridgeport with 151,599 people; New Jersey's is Newark with 317,303. Newark's population is 2.1 times (109%) 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 New Jersey's New York-Newark-Jersey City, NY-NJ metro area (19,940,274). New York-Newark-Jersey City, NY-NJ metro area's population is 17.1 times 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. New Jersey: Admitted to the Union on December 18, 1787, as the 3rd state. In its current form, New Jersey is the older of the two by 1 years.
Connecticut vs New Jersey Economy
GDP: Connecticut's GDP is $356.8 billion (2024) vs New Jersey's $846.0 billion. New Jersey's economic output is 2.4 times (137%) larger than Connecticut's.
GDP per capita: Connecticut: $97,096 per person vs New Jersey: $89,045. Connecticut's GDP per capita is 1.1 times (9%) higher than New Jersey's.
Average income: Connecticut: $95,067 vs New Jersey: $84,893 average income per person (per capita personal income). Connecticut's average income is 1.1 times (12%) higher than New Jersey's.
Connecticut vs New Jersey Counties
Number of counties: Connecticut has 9 counties, while New Jersey has 21. New Jersey's county count is 2.3 times (133%) higher than Connecticut's.
Biggest county by area: Connecticut's largest county is Capitol Planning Region at 1,027 square miles; New Jersey's is Burlington County at 799 square miles. Capitol Planning Region's land area is 1.3 times (29%) larger than Burlington County's.
Smallest county by area: Connecticut: Greater Bridgeport Planning Region (140 sq mi) vs New Jersey: Hudson County (46 sq mi). Greater Bridgeport Planning Region's land area is 3.0 times (203%) larger than Hudson County's.
Most populous county: Connecticut: Capitol Planning Region (991,508 people) vs New Jersey: Bergen County (978,641 people). Capitol Planning Region and Bergen County have about the same population.
Least populous county: Connecticut: Northeastern Connecticut Planning Region (97,701 people) vs New Jersey: Salem County (65,874 people). Northeastern Connecticut Planning Region's population is 1.5 times (48%) larger than Salem County's.
Richest county: Connecticut: Western Connecticut Planning Region ($165,513 per capita income) vs New Jersey: Somerset County ($121,042). Western Connecticut Planning Region's income is 1.4 times (37%) richer than Somerset County's.
Poorest county: Connecticut: Southeastern Connecticut Planning Region ($64,845 per capita income) vs New Jersey: Cumberland County ($50,843). Southeastern Connecticut Planning Region's income is 1.3 times (28%) richer than Cumberland County's.
Connecticut vs New Jersey Taxes
State income tax: Connecticut has a top income tax rate of 6.99%, while New Jersey has a top income tax rate of 10.75%. New Jersey's top rate is 3.76 percentage points higher.
Property tax: Connecticut: 1.66% effective rate vs New Jersey: 1.89% of home value per year. New Jersey's rate is 0.23 percentage points higher.
Sales tax: Connecticut: 6.35% combined state and average local rate vs New Jersey: 6.6%. New Jersey's combined rate is 0.25 percentage points higher.
Official Websites
Connecticut official website · New Jersey official website
More Size Comparisons
All Connecticut size comparisons · All New Jersey 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.