The map above shows Iowa and Ontario side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Iowa vs Ontario Geography
Land area: Iowa has a land area of 55,854 square miles (144,660 km²), while Ontario has 354,342 square miles (917,741 km²). Ontario's land area is 6.3 times (534%) larger than Iowa's.
Total area: Iowa: 56,273 square miles (145,746 km²) vs Ontario: 415,598 square miles (1,076,395 km²), including inland and coastal water. Ontario's total area is 7.4 times (639%) larger than Iowa's.
Length: Iowa is 216 miles (347 km) long from north to south; Ontario is 1,085 miles (1,747 km). Ontario's north-south length is 5.0 times (402%) longer than Iowa's.
Width: Iowa spans 335 miles (539 km) east to west; Ontario spans 1,013 miles (1,630 km). Ontario's east-west width is 3.0 times (202%) wider than Iowa's.
Highest point: Iowa's highest point is Hawkeye Point at 1,669 feet (509 m); Ontario's is Ishpatina Ridge at 2,274 feet (693 m). Ishpatina Ridge is 605 feet higher than Hawkeye Point.
Lowest point: Iowa's lowest point is Mississippi River at 480 feet; Ontario's is Hudson Bay at 0 feet. Ontario's lowest point is 480 feet lower.
Iowa vs Ontario Population and History
Population: Iowa has a population of 3,241,488 (2024), while Ontario has 16,136,480 (2026). Ontario's population is 5.0 times (398%) larger than Iowa's.
Population density: Iowa: 58.0 people per square mile vs Ontario: 45.5. Iowa's population density is 1.3 times (27%) higher than Ontario's.
Biggest city: Iowa's biggest city is Des Moines with 213,096 people; Ontario's is Toronto with 2,794,356. Toronto's population is 13.1 times larger than Des Moines'.
Largest metro area: Iowa's largest metropolitan area is Omaha, NE-IA metro area (1,001,010 people) vs Ontario's Toronto CMA (6,202,225). Toronto CMA's population is 6.2 times (520%) larger than Omaha, NE-IA metro area's.
History: Iowa: Admitted to the Union on December 28, 1846, as the 29th state. Ontario: Joined Confederation on July 1, 1867, as one of the four founding provinces. In its current form, Iowa is the older of the two by 21 years.
Iowa vs Ontario Economy
GDP: Iowa's GDP is $265.8 billion (2024) vs Ontario's $873.9 billion. Ontario's economic output is 3.3 times (229%) larger than Iowa's.
GDP per capita: Iowa: $81,998 per person vs Ontario: $54,132. Iowa's GDP per capita is 1.5 times (51%) higher than Ontario's.
Official Websites
Iowa official website · Ontario official website
More Size Comparisons
All Iowa 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.