The map above shows Maryland and Ontario side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Maryland vs Ontario Geography
Land area
- Maryland has a land area of 9,711 square miles (25,151 km²), while Ontario has 354,342 square miles (917,741 km²).
- Ontario's land area is 36.5 times larger than Maryland's.
Total area
- Maryland: 12,406 square miles (32,131 km²) vs Ontario: 415,598 square miles (1,076,395 km²), including inland and coastal water.
- Ontario's total area is 33.5 times larger than Maryland's.
Length
- Maryland is 231 miles (371 km) long from north to south; Ontario is 1,085 miles (1,747 km).
- Ontario's north-south length is 4.7 times (370%) longer than Maryland's.
Width
- Maryland spans 243 miles (391 km) east to west; Ontario spans 1,013 miles (1,630 km).
- Ontario's east-west width is 4.2 times (317%) wider than Maryland's.
Highest point
- Maryland's highest point is Hoye-Crest at 3,362 feet (1,025 m); Ontario's is Ishpatina Ridge at 2,274 feet (693 m).
- Hoye-Crest is 1,088 feet higher than Ishpatina Ridge.
Lowest point
- Maryland's lowest point is Atlantic Ocean at 0 feet; Ontario's is Hudson Bay at 0 feet.
- Both lowest points are at or near sea level.
Maryland vs Ontario Population and History
Population
- Maryland has a population of 6,263,220 (2024), while Ontario has 16,136,480 (2026).
- Ontario's population is 2.6 times (158%) larger than Maryland's.
Population density
- Maryland: 645.0 people per square mile vs Ontario: 45.5.
- Maryland's population density is 14.2 times higher than Ontario's.
Biggest city
- Maryland's biggest city is Baltimore with 568,271 people; Ontario's is Toronto with 2,794,356.
- Toronto's population is 4.9 times (392%) larger than Baltimore's.
Largest metro area
- Maryland's largest metropolitan area is Washington-Arlington-Alexandria, DC-VA-MD-WV metro area (6,436,489 people) vs Ontario's Toronto CMA (6,202,225).
- Washington-Arlington-Alexandria, DC-VA-MD-WV metro area and Toronto CMA have about the same population.
History
- Maryland: Admitted to the Union on April 28, 1788, as the 7th state.
- Ontario: Joined Confederation on July 1, 1867, as one of the four founding provinces.
- In its current form, Maryland is the older of the two by 79 years.
Maryland vs Ontario Economy
GDP
- Maryland's GDP is $546.0 billion (2024) vs Ontario's $873.9 billion.
- Ontario's economic output is 1.6 times (60%) larger than Maryland's.
GDP per capita
- Maryland: $87,180 per person vs Ontario: $54,132.
- Maryland's GDP per capita is 1.6 times (61%) higher than Ontario's.
Official Websites
Maryland official website · Ontario official website
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More Size Comparisons
All Maryland 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.