The map above shows Montana and Ohio side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Montana vs Ohio Geography
Land area: Montana has a land area of 145,550 square miles (376,973 km²), while Ohio has 40,859 square miles (105,824 km²). Montana's land area is 3.6 times (256%) larger than Ohio's.
Total area: Montana: 147,043 square miles (380,840 km²) vs Ohio: 44,826 square miles (116,098 km²), including inland and coastal water. Montana's total area is 3.3 times (228%) larger than Ohio's.
Length: Montana is 319 miles (514 km) long from north to south; Ohio is 291 miles (468 km). Montana's north-south length is 1.1 times (10%) longer than Ohio's.
Width: Montana spans 607 miles (976 km) east to west; Ohio spans 317 miles (510 km). Montana's east-west width is 1.9 times (91%) wider than Ohio's.
Highest point: Montana's highest point is Granite Peak at 12,767 feet (3,891 m); Ohio's is Campbell Hill at 1,547 feet (472 m). Granite Peak is 11,220 feet higher than Campbell Hill.
Lowest point: Montana's lowest point is Kootenai River at 1,805 feet; Ohio's is Ohio River at 455 feet. Ohio's lowest point is 1,350 feet lower.
Montana vs Ohio Population and History
Population: Montana has a population of 1,137,233 (2024), while Ohio has 11,883,304 (2024). Ohio's population is 10.4 times larger than Montana's.
Population density: Montana: 7.8 people per square mile vs Ohio: 290.8. Ohio's population density is 37.3 times higher than Montana's.
Biggest city: Montana's biggest city is Billings with 121,483 people; Ohio's is Columbus with 933,263. Columbus' population is 7.7 times (668%) larger than Billings'.
Largest metro area: Montana's largest metropolitan area is Billings, MT metro area (192,531 people) vs Ohio's Cincinnati, OH-KY-IN metro area (2,302,815). Cincinnati, OH-KY-IN metro area's population is 12.0 times larger than Billings, MT metro area's.
History: Montana: Admitted to the Union on November 8, 1889, as the 41st state. Ohio: Admitted to the Union on March 1, 1803, as the 17th state. In its current form, Ohio is the older of the two by 86 years.
Montana vs Ohio Economy
GDP: Montana's GDP is $78.4 billion (2024) vs Ohio's $923.1 billion. Ohio's economic output is 11.8 times larger than Montana's.
GDP per capita: Montana: $68,975 per person vs Ohio: $77,684. Ohio's GDP per capita is 1.1 times (13%) higher than Montana's.
Average income: Montana: $69,240 vs Ohio: $64,464 average income per person (per capita personal income). Montana's average income is 1.1 times (7%) higher than Ohio's.
Montana vs Ohio Counties
Number of counties: Montana has 56 counties, while Ohio has 88. Ohio's county count is 1.6 times (57%) higher than Montana's.
Biggest county by area: Montana's largest county is Beaverhead County at 5,543 square miles; Ohio's is Ashtabula County at 702 square miles. Beaverhead County's land area is 7.9 times (689%) larger than Ashtabula County's.
Smallest county by area: Montana: Silver Bow County (718 sq mi) vs Ohio: Lake County (229 sq mi). Silver Bow County's land area is 3.1 times (213%) larger than Lake County's.
Most populous county: Montana: Yellowstone County (171,583 people) vs Ohio: Franklin County (1,356,303 people). Franklin County's population is 7.9 times (690%) larger than Yellowstone County's.
Least populous county: Montana: Petroleum County (525 people) vs Ohio: Vinton County (12,545 people). Vinton County's population is 23.9 times larger than Petroleum County's.
Richest county: Montana: Gallatin County ($94,573 per capita income) vs Ohio: Delaware County ($96,573). Gallatin County and Delaware County have about the same income.
Poorest county: Montana: Blaine County ($37,554 per capita income) vs Ohio: Noble County ($34,940). Blaine County's income is 1.1 times (7%) richer than Noble County's.
Montana vs Ohio Taxes
State income tax: Montana has a top income tax rate of 5.65%, while Ohio has a top income tax rate of 2.75%. Montana's top rate is 2.9 percentage points higher.
Property tax: Montana: 0.69% effective rate vs Ohio: 1.22% of home value per year. Ohio's rate is 0.53 percentage points higher.
Sales tax: Montana: 0% combined state and average local rate vs Ohio: 7.29%. Ohio's combined rate is 7.29 percentage points higher.
Official Websites
Montana official website · Ohio official website
More Size Comparisons
All Montana size comparisons · All Ohio 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.