The map above shows Wisconsin and Ontario side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Wisconsin vs Ontario Geography
Land area: Wisconsin has a land area of 54,168 square miles (140,294 km²), while Ontario has 354,342 square miles (917,741 km²). Ontario's land area is 6.5 times (554%) larger than Wisconsin's.
Total area: Wisconsin: 65,497 square miles (169,636 km²) vs Ontario: 415,598 square miles (1,076,395 km²), including inland and coastal water. Ontario's total area is 6.3 times (535%) larger than Wisconsin's.
Length: Wisconsin is 368 miles (593 km) long from north to south; Ontario is 1,085 miles (1,747 km). Ontario's north-south length is 2.9 times (195%) longer than Wisconsin's.
Width: Wisconsin spans 323 miles (521 km) east to west; Ontario spans 1,013 miles (1,630 km). Ontario's east-west width is 3.1 times (214%) wider than Wisconsin's.
Highest point: Wisconsin's highest point is Timms Hill at 1,946 feet (593 m); Ontario's is Ishpatina Ridge at 2,274 feet (693 m). Ishpatina Ridge is 328 feet higher than Timms Hill.
Lowest point: Wisconsin's lowest point is Lake Michigan at 577 feet; Ontario's is Hudson Bay at 0 feet. Ontario's lowest point is 577 feet lower.
Wisconsin vs Ontario Population and History
Population: Wisconsin has a population of 5,960,975 (2024), while Ontario has 16,136,480 (2026). Ontario's population is 2.7 times (171%) larger than Wisconsin's.
Population density: Wisconsin: 110.0 people per square mile vs Ontario: 45.5. Wisconsin's population density is 2.4 times (142%) higher than Ontario's.
Biggest city: Wisconsin's biggest city is Milwaukee with 563,531 people; Ontario's is Toronto with 2,794,356. Toronto's population is 5.0 times (396%) larger than Milwaukee's.
Largest metro area: Wisconsin's largest metropolitan area is Minneapolis-St. Paul-Bloomington, MN-WI metro area (3,757,952 people) vs Ontario's Toronto CMA (6,202,225). Toronto CMA's population is 1.7 times (65%) larger than Minneapolis-St. Paul-Bloomington, MN-WI metro area's.
History: Wisconsin: Admitted to the Union on May 29, 1848, as the 30th state. Ontario: Joined Confederation on July 1, 1867, as one of the four founding provinces. In its current form, Wisconsin is the older of the two by 19 years.
Wisconsin vs Ontario Economy
GDP: Wisconsin's GDP is $453.3 billion (2024) vs Ontario's $873.9 billion. Ontario's economic output is 1.9 times (93%) larger than Wisconsin's.
GDP per capita: Wisconsin: $76,044 per person vs Ontario: $54,132. Wisconsin's GDP per capita is 1.4 times (40%) higher than Ontario's.
Official Websites
Wisconsin official website · Ontario official website
More Size Comparisons
All Wisconsin 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.