The map above shows Connecticut and Ontario side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Connecticut vs Ontario Geography
Land area: Connecticut has a land area of 4,843 square miles (12,542 km²), while Ontario has 354,342 square miles (917,741 km²). Ontario's land area is 73.2 times larger than Connecticut's.
Total area: Connecticut: 5,544 square miles (14,358 km²) vs Ontario: 415,598 square miles (1,076,395 km²), including inland and coastal water. Ontario's total area is 75.0 times larger than Connecticut's.
Length: Connecticut is 73 miles (118 km) long from north to south; Ontario is 1,085 miles (1,747 km). Ontario's north-south length is 14.9 times longer than Connecticut's.
Width: Connecticut spans 104 miles (167 km) east to west; Ontario spans 1,013 miles (1,630 km). Ontario's east-west width is 9.7 times (874%) wider than Connecticut's.
Highest point: Connecticut's highest point is Mount Frissell (south slope) at 2,376 feet (724 m); Ontario's is Ishpatina Ridge at 2,274 feet (693 m). Mount Frissell (south slope) is 102 feet higher than Ishpatina Ridge.
Lowest point: Connecticut's lowest point is Long Island Sound at 0 feet; Ontario's is Hudson Bay at 0 feet. Both lowest points are at or near sea level.
Connecticut vs Ontario Population and History
Population: Connecticut has a population of 3,675,069 (2024), while Ontario has 16,136,480 (2026). Ontario's population is 4.4 times (339%) larger than Connecticut's.
Population density: Connecticut: 758.9 people per square mile vs Ontario: 45.5. Connecticut's population density is 16.7 times higher than Ontario's.
Biggest city: Connecticut's biggest city is Bridgeport with 151,599 people; Ontario's is Toronto with 2,794,356. Toronto's population is 18.4 times 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 Ontario's Toronto CMA (6,202,225). Toronto CMA's population is 5.3 times (431%) 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. Ontario: Joined Confederation on July 1, 1867, as one of the four founding provinces. In its current form, Connecticut is the older of the two by 79 years.
Connecticut vs Ontario Economy
GDP: Connecticut's GDP is $356.8 billion (2024) vs Ontario's $873.9 billion. Ontario's economic output is 2.4 times (145%) larger than Connecticut's.
GDP per capita: Connecticut: $97,096 per person vs Ontario: $54,132. Connecticut's GDP per capita is 1.8 times (79%) higher than Ontario's.
Official Websites
Connecticut official website · Ontario official website
More Size Comparisons
All Connecticut 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.