The map above shows Kentucky and Ontario side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Kentucky vs Ontario Geography
Land area: Kentucky has a land area of 39,485 square miles (102,267 km²), while Ontario has 354,342 square miles (917,741 km²). Ontario's land area is 9.0 times (797%) larger than Kentucky's.
Total area: Kentucky: 40,406 square miles (104,651 km²) vs Ontario: 415,598 square miles (1,076,395 km²), including inland and coastal water. Ontario's total area is 10.3 times larger than Kentucky's.
Length: Kentucky is 257 miles (414 km) long from north to south; Ontario is 1,085 miles (1,747 km). Ontario's north-south length is 4.2 times (322%) longer than Kentucky's.
Width: Kentucky spans 418 miles (672 km) east to west; Ontario spans 1,013 miles (1,630 km). Ontario's east-west width is 2.4 times (142%) wider than Kentucky's.
Highest point: Kentucky's highest point is Black Mountain at 4,134 feet (1,260 m); Ontario's is Ishpatina Ridge at 2,274 feet (693 m). Black Mountain is 1,860 feet higher than Ishpatina Ridge.
Lowest point: Kentucky's lowest point is Mississippi River at 270 feet; Ontario's is Hudson Bay at 0 feet. Ontario's lowest point is 270 feet lower.
Kentucky vs Ontario Population and History
Population: Kentucky has a population of 4,588,372 (2024), while Ontario has 16,136,480 (2026). Ontario's population is 3.5 times (252%) larger than Kentucky's.
Population density: Kentucky: 116.2 people per square mile vs Ontario: 45.5. Kentucky's population density is 2.6 times (155%) higher than Ontario's.
Biggest city: Kentucky's biggest city is Louisville with 640,796 people; Ontario's is Toronto with 2,794,356. Toronto's population is 4.4 times (336%) larger than Louisville's.
Largest metro area: Kentucky's largest metropolitan area is Cincinnati, OH-KY-IN metro area (2,302,815 people) vs Ontario's Toronto CMA (6,202,225). Toronto CMA's population is 2.7 times (169%) larger than Cincinnati, OH-KY-IN metro area's.
History: Kentucky: Admitted to the Union on June 1, 1792, as the 15th state. Ontario: Joined Confederation on July 1, 1867, as one of the four founding provinces. In its current form, Kentucky is the older of the two by 75 years.
Kentucky vs Ontario Economy
GDP: Kentucky's GDP is $295.4 billion (2024) vs Ontario's $873.9 billion. Ontario's economic output is 3.0 times (196%) larger than Kentucky's.
GDP per capita: Kentucky: $64,375 per person vs Ontario: $54,132. Kentucky's GDP per capita is 1.2 times (19%) higher than Ontario's.
Official Websites
Kentucky official website · Ontario official website
More Size Comparisons
All Kentucky 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.