The map above shows Maine and Ontario side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Maine vs Ontario Geography
Land area
- Maine has a land area of 30,845 square miles (79,888 km²), while Ontario has 354,342 square miles (917,741 km²).
- Ontario's land area is 11.5 times larger than Maine's.
Total area
- Maine: 35,380 square miles (91,634 km²) vs Ontario: 415,598 square miles (1,076,395 km²), including inland and coastal water.
- Ontario's total area is 11.7 times larger than Maine's.
Length
- Maine is 311 miles (501 km) long from north to south; Ontario is 1,085 miles (1,747 km).
- Ontario's north-south length is 3.5 times (249%) longer than Maine's.
Width
- Maine spans 203 miles (327 km) east to west; Ontario spans 1,013 miles (1,630 km).
- Ontario's east-west width is 5.0 times (399%) wider than Maine's.
Highest point
- Maine's highest point is Mount Katahdin at 5,253 feet (1,601 m); Ontario's is Ishpatina Ridge at 2,274 feet (693 m).
- Mount Katahdin is 2,979 feet higher than Ishpatina Ridge.
Lowest point
- Maine'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.
Maine vs Ontario Population and History
Population
- Maine has a population of 1,405,012 (2024), while Ontario has 16,136,480 (2026).
- Ontario's population is 11.5 times larger than Maine's.
Population density
- Maine: 45.6 people per square mile vs Ontario: 45.5.
- Maine and Ontario have about the same population density.
Biggest city
- Maine's biggest city is Portland with 69,568 people; Ontario's is Toronto with 2,794,356.
- Toronto's population is 40.2 times larger than Portland's.
Largest metro area
- Maine's largest metropolitan area is Portland-South Portland, ME metro area (571,534 people) vs Ontario's Toronto CMA (6,202,225).
- Toronto CMA's population is 10.9 times larger than Portland-South Portland, ME metro area's.
History
- Maine: Admitted to the Union on March 15, 1820, as the 23rd state.
- Ontario: Joined Confederation on July 1, 1867, as one of the four founding provinces.
- In its current form, Maine is the older of the two by 47 years.
Maine vs Ontario Economy
GDP
- Maine's GDP is $99.2 billion (2024) vs Ontario's $873.9 billion.
- Ontario's economic output is 8.8 times (781%) larger than Maine's.
GDP per capita
- Maine: $70,586 per person vs Ontario: $54,132.
- Maine's GDP per capita is 1.3 times (30%) higher than Ontario's.
Official Websites
Maine official website · Ontario official website
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More Size Comparisons
All Maine 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.