The map above shows Indiana and Ontario side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Indiana vs Ontario Geography
Land area: Indiana has a land area of 35,825 square miles (92,787 km²), while Ontario has 354,342 square miles (917,741 km²). Ontario's land area is 9.9 times (889%) larger than Indiana's.
Total area: Indiana: 36,421 square miles (94,331 km²) vs Ontario: 415,598 square miles (1,076,395 km²), including inland and coastal water. Ontario's total area is 11.4 times larger than Indiana's.
Length: Indiana is 276 miles (444 km) long from north to south; Ontario is 1,085 miles (1,747 km). Ontario's north-south length is 3.9 times (293%) longer than Indiana's.
Width: Indiana spans 193 miles (310 km) east to west; Ontario spans 1,013 miles (1,630 km). Ontario's east-west width is 5.2 times (425%) wider than Indiana's.
Highest point: Indiana's highest point is Hoosier Hill at 1,255 feet (383 m); Ontario's is Ishpatina Ridge at 2,274 feet (693 m). Ishpatina Ridge is 1,019 feet higher than Hoosier Hill.
Lowest point: Indiana's lowest point is Ohio River at 330 feet; Ontario's is Hudson Bay at 0 feet. Ontario's lowest point is 330 feet lower.
Indiana vs Ontario Population and History
Population: Indiana has a population of 6,924,275 (2024), while Ontario has 16,136,480 (2026). Ontario's population is 2.3 times (133%) larger than Indiana's.
Population density: Indiana: 193.3 people per square mile vs Ontario: 45.5. Indiana's population density is 4.2 times (325%) higher than Ontario's.
Biggest city: Indiana's biggest city is Indianapolis with 891,484 people; Ontario's is Toronto with 2,794,356. Toronto's population is 3.1 times (213%) larger than Indianapolis'.
Largest metro area: Indiana's largest metropolitan area is Chicago-Naperville-Elgin, IL-IN metro area (9,408,576 people) vs Ontario's Toronto CMA (6,202,225). Chicago-Naperville-Elgin, IL-IN metro area's population is 1.5 times (52%) larger than Toronto CMA's.
History: Indiana: Admitted to the Union on December 11, 1816, as the 19th state. Ontario: Joined Confederation on July 1, 1867, as one of the four founding provinces. In its current form, Indiana is the older of the two by 51 years.
Indiana vs Ontario Economy
GDP: Indiana's GDP is $519.5 billion (2024) vs Ontario's $873.9 billion. Ontario's economic output is 1.7 times (68%) larger than Indiana's.
GDP per capita: Indiana: $75,028 per person vs Ontario: $54,132. Indiana's GDP per capita is 1.4 times (39%) higher than Ontario's.
Official Websites
Indiana official website · Ontario official website
More Size Comparisons
All Indiana 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.