The map above shows New Jersey and Ontario side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
New Jersey vs Ontario Geography
Land area: New Jersey has a land area of 7,355 square miles (19,049 km²), while Ontario has 354,342 square miles (917,741 km²). Ontario's land area is 48.2 times larger than New Jersey's.
Total area: New Jersey: 8,719 square miles (22,583 km²) vs Ontario: 415,598 square miles (1,076,395 km²), including inland and coastal water. Ontario's total area is 47.7 times larger than New Jersey's.
Length: New Jersey is 169 miles (271 km) long from north to south; Ontario is 1,085 miles (1,747 km). Ontario's north-south length is 6.4 times (542%) longer than New Jersey's.
Width: New Jersey spans 129 miles (207 km) east to west; Ontario spans 1,013 miles (1,630 km). Ontario's east-west width is 7.9 times (685%) wider than New Jersey's.
Highest point: New Jersey's highest point is High Point at 1,798 feet (548 m); Ontario's is Ishpatina Ridge at 2,274 feet (693 m). Ishpatina Ridge is 476 feet higher than High Point.
Lowest point: New Jersey's lowest point is Atlantic Ocean at 0 feet; Ontario's is Hudson Bay at 0 feet. Both lowest points are at or near sea level.
New Jersey vs Ontario Population and History
Population: New Jersey has a population of 9,500,851 (2024), while Ontario has 16,136,480 (2026). Ontario's population is 1.7 times (70%) larger than New Jersey's.
Population density: New Jersey: 1,291.8 people per square mile vs Ontario: 45.5. New Jersey's population density is 28.4 times higher than Ontario's.
Biggest city: New Jersey's biggest city is Newark with 317,303 people; Ontario's is Toronto with 2,794,356. Toronto's population is 8.8 times (781%) larger than Newark's.
Largest metro area: New Jersey's largest metropolitan area is New York-Newark-Jersey City, NY-NJ metro area (19,940,274 people) vs Ontario's Toronto CMA (6,202,225). New York-Newark-Jersey City, NY-NJ metro area's population is 3.2 times (222%) larger than Toronto CMA's.
History: New Jersey: Admitted to the Union on December 18, 1787, as the 3rd state. Ontario: Joined Confederation on July 1, 1867, as one of the four founding provinces. In its current form, New Jersey is the older of the two by 80 years.
New Jersey vs Ontario Economy
GDP: New Jersey's GDP is $846.0 billion (2024) vs Ontario's $873.9 billion. New Jersey and Ontario have about the same economic output.
GDP per capita: New Jersey: $89,045 per person vs Ontario: $54,132. New Jersey's GDP per capita is 1.6 times (64%) higher than Ontario's.
Official Websites
New Jersey official website · Ontario official website
More Size Comparisons
All New Jersey size comparisons · All Ontario 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.