The map above shows Massachusetts and Ontario side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Massachusetts vs Ontario Geography
Land area
- Massachusetts has a land area of 7,801 square miles (20,204 km²), while Ontario has 354,342 square miles (917,741 km²).
- Ontario's land area is 45.4 times larger than Massachusetts'.
Total area
- Massachusetts: 10,554 square miles (27,335 km²) vs Ontario: 415,598 square miles (1,076,395 km²), including inland and coastal water.
- Ontario's total area is 39.4 times larger than Massachusetts'.
Length
- Massachusetts is 123 miles (198 km) long from north to south; Ontario is 1,085 miles (1,747 km).
- Ontario's north-south length is 8.8 times (782%) longer than Massachusetts'.
Width
- Massachusetts spans 185 miles (297 km) east to west; Ontario spans 1,013 miles (1,630 km).
- Ontario's east-west width is 5.5 times (448%) wider than Massachusetts'.
Highest point
- Massachusetts's highest point is Mount Greylock at 3,489 feet (1,063 m); Ontario's is Ishpatina Ridge at 2,274 feet (693 m).
- Mount Greylock is 1,215 feet higher than Ishpatina Ridge.
Lowest point
- Massachusetts'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.
Massachusetts vs Ontario Population and History
Population
- Massachusetts has a population of 7,136,171 (2024), while Ontario has 16,136,480 (2026).
- Ontario's population is 2.3 times (126%) larger than Massachusetts'.
Population density
- Massachusetts: 914.8 people per square mile vs Ontario: 45.5.
- Massachusetts' population density is 20.1 times higher than Ontario's.
Biggest city
- Massachusetts's biggest city is Boston with 673,458 people; Ontario's is Toronto with 2,794,356.
- Toronto's population is 4.1 times (315%) larger than Boston's.
Largest metro area
- Massachusetts's largest metropolitan area is Boston-Cambridge-Newton, MA-NH metro area (5,025,517 people) vs Ontario's Toronto CMA (6,202,225).
- Toronto CMA's population is 1.2 times (23%) larger than Boston-Cambridge-Newton, MA-NH metro area's.
History
- Massachusetts: Admitted to the Union on February 6, 1788, as the 6th state.
- Ontario: Joined Confederation on July 1, 1867, as one of the four founding provinces.
- In its current form, Massachusetts is the older of the two by 79 years.
Massachusetts vs Ontario Economy
GDP
- Massachusetts's GDP is $778.5 billion (2024) vs Ontario's $873.9 billion.
- Ontario's economic output is 1.1 times (12%) larger than Massachusetts'.
GDP per capita
- Massachusetts: $109,095 per person vs Ontario: $54,132.
- Massachusetts' GDP per capita is 2.0 times (102%) higher than Ontario's.
Official Websites
Massachusetts official website · Ontario official website
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More Size Comparisons
All Massachusetts 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.