The map above shows California and Ontario side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
California vs Ontario Geography
Land area
- California has a land area of 155,859 square miles (403,673 km²), while Ontario has 354,342 square miles (917,741 km²).
- Ontario's land area is 2.3 times (127%) larger than California's.
Total area
- California: 163,694 square miles (423,965 km²) vs Ontario: 415,598 square miles (1,076,395 km²), including inland and coastal water.
- Ontario's total area is 2.5 times (154%) larger than California's.
Length
- California is 761 miles (1,224 km) long from north to south; Ontario is 1,085 miles (1,747 km).
- Ontario's north-south length is 1.4 times (43%) longer than California's.
Width
- California spans 706 miles (1,137 km) east to west; Ontario spans 1,013 miles (1,630 km).
- Ontario's east-west width is 1.4 times (43%) wider than California's.
Highest point
- California's highest point is Mount Whitney at 14,484 feet (4,415 m); Ontario's is Ishpatina Ridge at 2,274 feet (693 m).
- Mount Whitney is 12,210 feet higher than Ishpatina Ridge.
Lowest point
- California's lowest point is Death Valley at -279 feet; Ontario's is Hudson Bay at 0 feet.
- California's lowest point is 279 feet lower.
California vs Ontario Population and History
Population
- California has a population of 39,431,263 (2024), while Ontario has 16,136,480 (2026).
- California's population is 2.4 times (144%) larger than Ontario's.
Population density
- California: 253.0 people per square mile vs Ontario: 45.5.
- California's population density is 5.6 times (456%) higher than Ontario's.
Biggest city
- California's biggest city is Los Angeles with 3,878,704 people; Ontario's is Toronto with 2,794,356.
- Los Angeles' population is 1.4 times (39%) larger than Toronto's.
Largest metro area
- California's largest metropolitan area is Los Angeles-Long Beach-Anaheim, CA metro area (12,927,614 people) vs Ontario's Toronto CMA (6,202,225).
- Los Angeles-Long Beach-Anaheim, CA metro area's population is 2.1 times (108%) larger than Toronto CMA's.
History
- California: Admitted to the Union on September 9, 1850, as the 31st state.
- Ontario: Joined Confederation on July 1, 1867, as one of the four founding provinces.
- In its current form, California is the older of the two by 17 years.
California vs Ontario Economy
GDP
- California's GDP is $4,048.1 billion (2024) vs Ontario's $873.9 billion.
- California's economic output is 4.6 times (363%) larger than Ontario's.
GDP per capita
- California: $102,662 per person vs Ontario: $54,132.
- California's GDP per capita is 1.9 times (90%) higher than Ontario's.
Official Websites
California official website · Ontario official website
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More Size Comparisons
All California 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.