The map above shows Delaware and New Jersey side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Delaware vs New Jersey Geography
Land area: Delaware has a land area of 1,949 square miles (5,047 km²), while New Jersey has 7,355 square miles (19,049 km²). New Jersey's land area is 3.8 times (277%) larger than Delaware's.
Total area: Delaware: 2,489 square miles (6,446 km²) vs New Jersey: 8,719 square miles (22,583 km²), including inland and coastal water. New Jersey's total area is 3.5 times (250%) larger than Delaware's.
Length: Delaware is 98 miles (158 km) long from north to south; New Jersey is 169 miles (271 km). New Jersey's north-south length is 1.7 times (72%) longer than Delaware's.
Width: Delaware spans 96 miles (155 km) east to west; New Jersey spans 129 miles (207 km). New Jersey's east-west width is 1.3 times (34%) wider than Delaware's.
Highest point: Delaware's highest point is Ebright Azimuth at 450 feet (137 m); New Jersey's is High Point at 1,798 feet (548 m). High Point is 1,348 feet higher than Ebright Azimuth.
Lowest point: Delaware's lowest point is Atlantic Ocean at 0 feet; New Jersey's is Atlantic Ocean at 0 feet. Both lowest points are at or near sea level.
Delaware vs New Jersey Population and History
Population: Delaware has a population of 1,051,917 (2024), while New Jersey has 9,500,851 (2024). New Jersey's population is 9.0 times (803%) larger than Delaware's.
Population density: Delaware: 539.9 people per square mile vs New Jersey: 1,291.8. New Jersey's population density is 2.4 times (139%) higher than Delaware's.
Biggest city: Delaware's biggest city is Wilmington with 73,176 people; New Jersey's is Newark with 317,303. Newark's population is 4.3 times (334%) larger than Wilmington's.
Largest metro area: Delaware's largest metropolitan area is Philadelphia-Camden-Wilmington, PA-NJ-DE-MD metro area (6,330,422 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 3.1 times (215%) larger than Philadelphia-Camden-Wilmington, PA-NJ-DE-MD metro area's.
History: Delaware: Admitted to the Union on December 7, 1787, as the 1st state. New Jersey: Admitted to the Union on December 18, 1787, as the 3rd state.
Delaware vs New Jersey Economy
GDP: Delaware's GDP is $111.0 billion (2024) vs New Jersey's $846.0 billion. New Jersey's economic output is 7.6 times (662%) larger than Delaware's.
GDP per capita: Delaware: $105,495 per person vs New Jersey: $89,045. Delaware's GDP per capita is 1.2 times (18%) higher than New Jersey's.
Average income: Delaware: $68,061 vs New Jersey: $84,893 average income per person (per capita personal income). New Jersey's average income is 1.2 times (25%) higher than Delaware's.
Delaware vs New Jersey Counties
Number of counties: Delaware has 3 counties, while New Jersey has 21. New Jersey's county count is 7.0 times (600%) higher than Delaware's.
Biggest county by area: Delaware's largest county is Sussex County at 936 square miles; New Jersey's is Burlington County at 799 square miles. Sussex County's land area is 1.2 times (17%) larger than Burlington County's.
Smallest county by area: Delaware: New Castle County (426 sq mi) vs New Jersey: Hudson County (46 sq mi). New Castle County's land area is 9.2 times (823%) larger than Hudson County's.
Most populous county: Delaware: New Castle County (588,093 people) vs New Jersey: Bergen County (978,641 people). Bergen County's population is 1.7 times (66%) larger than New Castle County's.
Least populous county: Delaware: Kent County (192,690 people) vs New Jersey: Salem County (65,874 people). Kent County's population is 2.9 times (193%) larger than Salem County's.
Richest county: Delaware: Sussex County ($73,647 per capita income) vs New Jersey: Somerset County ($121,042). Somerset County's income is 1.6 times (64%) richer than Sussex County's.
Poorest county: Delaware: Kent County ($55,474 per capita income) vs New Jersey: Cumberland County ($50,843). Kent County's income is 1.1 times (9%) richer than Cumberland County's.
Delaware vs New Jersey Taxes
State income tax: Delaware has a top income tax rate of 6.6%, while New Jersey has a top income tax rate of 10.75%. New Jersey's top rate is 4.15 percentage points higher.
Property tax: Delaware: 0.47% effective rate vs New Jersey: 1.89% of home value per year. New Jersey's rate is 1.42 percentage points higher.
Sales tax: Delaware: 0% combined state and average local rate vs New Jersey: 6.6%. New Jersey's combined rate is 6.6 percentage points higher.
Official Websites
Delaware official website · New Jersey official website
More Size Comparisons
All Delaware 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.