The map above shows District of Columbia and New Jersey side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
District of Columbia vs New Jersey Geography
Land area
- District of Columbia has a land area of 61 square miles (158 km²), while New Jersey has 7,355 square miles (19,049 km²).
- New Jersey's land area is 120.6 times larger than District of Columbia's.
Total area
- District of Columbia: 68 square miles (177 km²) vs New Jersey: 8,719 square miles (22,583 km²), including inland and coastal water.
- New Jersey's total area is 127.6 times larger than District of Columbia's.
Length
- District of Columbia is 13 miles (22 km) long from north to south; New Jersey is 169 miles (271 km).
- New Jersey's north-south length is 13.0 times longer than District of Columbia's.
Width
- District of Columbia spans 12 miles (19 km) east to west; New Jersey spans 129 miles (207 km).
- New Jersey's east-west width is 10.8 times wider than District of Columbia's.
Highest point
- District of Columbia's highest point is Fort Reno at 429 feet (131 m); New Jersey's is High Point at 1,798 feet (548 m).
- High Point is 1,369 feet higher than Fort Reno.
Lowest point
- District of Columbia's lowest point is Potomac River at 0 feet; New Jersey's is Atlantic Ocean at 0 feet.
- Both lowest points are at or near sea level.
District of Columbia vs New Jersey Population and History
Population
- District of Columbia has a population of 702,250 (2024), while New Jersey has 9,500,851 (2024).
- New Jersey's population is 13.5 times larger than District of Columbia's.
Population density
- District of Columbia: 11,493.5 people per square mile vs New Jersey: 1,291.8.
- District of Columbia's population density is 8.9 times (790%) higher than New Jersey's.
Biggest city
- District of Columbia's biggest city is Washington with 702,250 people; New Jersey's is Newark with 317,303.
- Washington's population is 2.2 times (121%) larger than Newark's.
Largest metro area
- District of Columbia's largest metropolitan area is Washington-Arlington-Alexandria, DC-VA-MD-WV metro area (6,436,489 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 (210%) larger than Washington-Arlington-Alexandria, DC-VA-MD-WV metro area's.
History
- District of Columbia: The federal district, established by the Residence Act on July 16, 1790; not a 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 3 years.
District of Columbia vs New Jersey Economy
GDP
- District of Columbia's GDP is $184.3 billion (2024) vs New Jersey's $846.0 billion.
- New Jersey's economic output is 4.6 times (359%) larger than District of Columbia's.
GDP per capita
- District of Columbia: $262,439 per person vs New Jersey: $89,045.
- District of Columbia's GDP per capita is 2.9 times (195%) higher than New Jersey's.
Average income
- District of Columbia: $111,185 vs New Jersey: $84,893 average income per person (per capita personal income).
- District of Columbia's average income is 1.3 times (31%) higher than New Jersey's.
District of Columbia vs New Jersey Counties
Number of counties
- District of Columbia has 1 counties, while New Jersey has 21.
- New Jersey's county count is 21.0 times higher than District of Columbia's.
Biggest county by area
- District of Columbia's largest county is District of Columbia at 61 square miles; New Jersey's is Burlington County at 799 square miles.
- Burlington County's land area is 13.1 times larger than District of Columbia's.
Smallest county by area
- District of Columbia: District of Columbia (61 sq mi) vs New Jersey: Hudson County (46 sq mi).
- District of Columbia's land area is 1.3 times (32%) larger than Hudson County's.
Most populous county
- District of Columbia: District of Columbia (702,250 people) vs New Jersey: Bergen County (978,641 people).
- Bergen County's population is 1.4 times (39%) larger than District of Columbia's.
Least populous county
- District of Columbia: District of Columbia (702,250 people) vs New Jersey: Salem County (65,874 people).
- District of Columbia's population is 10.7 times larger than Salem County's.
Richest county
- District of Columbia: District of Columbia ($111,185 per capita income) vs New Jersey: Somerset County ($121,042).
- Somerset County's income is 1.1 times (9%) richer than District of Columbia's.
Poorest county
- District of Columbia: District of Columbia ($111,185 per capita income) vs New Jersey: Cumberland County ($50,843).
- District of Columbia's income is 2.2 times (119%) richer than Cumberland County's.
District of Columbia vs New Jersey Taxes
State income tax
- District of Columbia has a top income tax rate of 10.75%, while New Jersey has a top income tax rate of 10.75%.
Property tax
- District of Columbia: 0.63% effective rate vs New Jersey: 1.89% of home value per year.
- New Jersey's rate is 1.26 percentage points higher.
Sales tax
- District of Columbia: 6% combined state and average local rate vs New Jersey: 6.6%.
- New Jersey's combined rate is 0.6 percentage points higher.
Official Websites
District of Columbia official website · New Jersey official website
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More Size Comparisons
All District of Columbia 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.