The map above shows Arkansas and Ontario side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Arkansas vs Ontario Geography
Land area: Arkansas has a land area of 51,992 square miles (134,658 km²), while Ontario has 354,342 square miles (917,741 km²). Ontario's land area is 6.8 times (582%) larger than Arkansas'.
Total area: Arkansas: 53,198 square miles (137,781 km²) vs Ontario: 415,598 square miles (1,076,395 km²), including inland and coastal water. Ontario's total area is 7.8 times (681%) larger than Arkansas'.
Length: Arkansas is 243 miles (392 km) long from north to south; Ontario is 1,085 miles (1,747 km). Ontario's north-south length is 4.5 times (347%) longer than Arkansas'.
Width: Arkansas spans 279 miles (449 km) east to west; Ontario spans 1,013 miles (1,630 km). Ontario's east-west width is 3.6 times (263%) wider than Arkansas'.
Highest point: Arkansas's highest point is Mount Magazine at 2,752 feet (839 m); Ontario's is Ishpatina Ridge at 2,274 feet (693 m). Mount Magazine is 478 feet higher than Ishpatina Ridge.
Lowest point: Arkansas's lowest point is Ouachita River at 55 feet; Ontario's is Hudson Bay at 0 feet. Ontario's lowest point is 55 feet lower.
Arkansas vs Ontario Population and History
Population: Arkansas has a population of 3,088,354 (2024), while Ontario has 16,136,480 (2026). Ontario's population is 5.2 times (422%) larger than Arkansas'.
Population density: Arkansas: 59.4 people per square mile vs Ontario: 45.5. Arkansas' population density is 1.3 times (31%) higher than Ontario's.
Biggest city: Arkansas's biggest city is Little Rock with 204,774 people; Ontario's is Toronto with 2,794,356. Toronto's population is 13.6 times larger than Little Rock's.
Largest metro area: Arkansas's largest metropolitan area is Memphis, TN-MS-AR metro area (1,339,345 people) vs Ontario's Toronto CMA (6,202,225). Toronto CMA's population is 4.6 times (363%) larger than Memphis, TN-MS-AR metro area's.
History: Arkansas: Admitted to the Union on June 15, 1836, as the 25th state. Ontario: Joined Confederation on July 1, 1867, as one of the four founding provinces. In its current form, Arkansas is the older of the two by 31 years.
Arkansas vs Ontario Economy
GDP: Arkansas's GDP is $188.3 billion (2024) vs Ontario's $873.9 billion. Ontario's economic output is 4.6 times (364%) larger than Arkansas'.
GDP per capita: Arkansas: $60,984 per person vs Ontario: $54,132. Arkansas' GDP per capita is 1.1 times (13%) higher than Ontario's.
Official Websites
Arkansas official website · Ontario official website
More Size Comparisons
All Arkansas 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.