The map above shows Missouri and Ontario side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Missouri vs Ontario Geography
Land area
- Missouri has a land area of 68,746 square miles (178,052 km²), while Ontario has 354,342 square miles (917,741 km²).
- Ontario's land area is 5.2 times (415%) larger than Missouri's.
Total area
- Missouri: 69,707 square miles (180,540 km²) vs Ontario: 415,598 square miles (1,076,395 km²), including inland and coastal water.
- Ontario's total area is 6.0 times (496%) larger than Missouri's.
Length
- Missouri is 328 miles (529 km) long from north to south; Ontario is 1,085 miles (1,747 km).
- Ontario's north-south length is 3.3 times (231%) longer than Missouri's.
Width
- Missouri spans 437 miles (703 km) east to west; Ontario spans 1,013 miles (1,630 km).
- Ontario's east-west width is 2.3 times (132%) wider than Missouri's.
Highest point
- Missouri's highest point is Taum Sauk Mountain at 1,771 feet (540 m); Ontario's is Ishpatina Ridge at 2,274 feet (693 m).
- Ishpatina Ridge is 503 feet higher than Taum Sauk Mountain.
Lowest point
- Missouri's lowest point is St. Francis River at 230 feet; Ontario's is Hudson Bay at 0 feet.
- Ontario's lowest point is 230 feet lower.
Missouri vs Ontario Population and History
Population
- Missouri has a population of 6,245,466 (2024), while Ontario has 16,136,480 (2026).
- Ontario's population is 2.6 times (158%) larger than Missouri's.
Population density
- Missouri: 90.8 people per square mile vs Ontario: 45.5.
- Missouri's population density is 2.0 times (100%) higher than Ontario's.
Biggest city
- Missouri's biggest city is Kansas City with 516,032 people; Ontario's is Toronto with 2,794,356.
- Toronto's population is 5.4 times (442%) larger than Kansas City's.
Largest metro area
- Missouri's largest metropolitan area is St. Louis, MO-IL metro area (2,811,927 people) vs Ontario's Toronto CMA (6,202,225).
- Toronto CMA's population is 2.2 times (121%) larger than St. Louis, MO-IL metro area's.
History
- Missouri: Admitted to the Union on August 10, 1821, as the 24th state.
- Ontario: Joined Confederation on July 1, 1867, as one of the four founding provinces.
- In its current form, Missouri is the older of the two by 46 years.
Missouri vs Ontario Economy
GDP
- Missouri's GDP is $448.7 billion (2024) vs Ontario's $873.9 billion.
- Ontario's economic output is 1.9 times (95%) larger than Missouri's.
GDP per capita
- Missouri: $71,846 per person vs Ontario: $54,132.
- Missouri's GDP per capita is 1.3 times (33%) higher than Ontario's.
Official Websites
Missouri official website · Ontario official website
Download the Missouri vs Ontario Size Comparison Map for free
To download the map, right-click the image above (or press and hold on a phone or tablet) and choose Save image as. The map is free to use anywhere, including on your own website or in print, as long as you credit it with a link back to this page or to BrilliantMaps.com.
More Size Comparisons
All Missouri 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.