State of the United States

New Jersey

New Jersey is a state of the United States. It covers about 19,700 km² (7,590 mi²), the 46th largest of the 51 states and districts in Natural Earth’s file for the United States, and 97% of the size of Slovenia. About 9.3 million people live there (Wikidata, 2020).

In area0.97×the size ofSlovenia20,300 km² In people1.02×as many people asSwitzerland9.1 million

50 km

Slovenia
New Jersey

Facts

Area, measured	19,700 km²7,590 mi²
Official area	22,600 km²Wikidata · 13% above our measure
Share of the United States	0.2%of the area of the 51 states and districts
Rank by area	46th of 51states and districts of the United States
Population	9.3 millionWikidata, 2020 · the census year of every unit
Density	472 people per km²
Capital	Trenton
Latitude range	39°N to 41°N
Type	StateUS-NJ

What the numbers say about New Jersey

New Jersey covers 0.2% of the area of the United States and ranks 11th of 51 by population, against 46th by area.
It would take 481 states and districts the size of New Jersey to cover the United States.
New Jersey holds 2.8% of the 331.4 million people that Wikidata’s 2020 figures give for the 51 states and districts together: about 1 in 36.
The largest, Alaska, is 76.5× the size of New Jersey; the smallest, Washington, D.C., is 0.8% of it.
Closest in size within the United States: Massachusetts (21,200 km², 1.08×) and Hawaii (16,800 km², 1.17×).
Counted as a country, New Jersey would be larger than 85 of the 239 countries and territories listed on sizeversus, and would rank 155th by area, between Slovenia (20,300 km²) and Fiji (18,900 km²).
With 9.3 million people it would rank 96th of 238 by population.
New Jersey has 472 people per km², about the density of the Netherlands, which has 480 per km².
That makes New Jersey the 2nd most densely populated of the 51 states and districts, 13.5× the average for the United States (35 per km²).
On a standard web map (Web Mercator), a place at 40°N is drawn about 1.7× too large in area, so New Jersey looks bigger there than it is.
Laid out flat, New Jersey stretches about 270 km north to south and 140 km east to west.
Our measured 19,700 km² is 13% below Wikidata's official figure of 22,600 km². Official figures can include inland water or count land that an outline draws differently. This difference is flagged for review.

About the same size as

About as many people as

Beside the regions of other countries

The closest region by area and by people in each of the other countries that have regional pages here, within a factor of 2. All 395 regions side by side.

Where New Jersey ranks

New Jersey is the 46th largest of the 51 states and districts of the United States.

Ranked within the United States

All 51 states and districts of the United States, matched to countries

Compare New Jersey

Sources and method

Outline: Natural Earth, 1:10m Admin 1 - States, Provinces, public domain
Boundary: De facto, as drawn by Natural Earth.
Area: Measured on the WGS84 ellipsoid from the full-detail outline, shown rounded. The region’s whole area is counted, every island included.
Official figures: Area, population and capital from Wikidata (CC0), fetched 2026-11-12
Population: Wikidata, 2020. United States’s units share the 2020 figures where Wikidata has them; the year is shown wherever the figure is.
Matching: Countries come from Natural Earth’s country file. Places whose status is contested and dependencies are never used as automatic matches. A region under 2,500 km² is matched against the small countries and island nations.
Data built: 2026-11-12

Full method