The map above shows Montana and Oregon side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Montana vs Oregon Geography
Land area: Montana has a land area of 145,550 square miles (376,973 km²), while Oregon has 95,997 square miles (248,630 km²). Montana's land area is 1.5 times (52%) larger than Oregon's.
Total area: Montana: 147,043 square miles (380,840 km²) vs Oregon: 98,379 square miles (254,799 km²), including inland and coastal water. Montana's total area is 1.5 times (49%) larger than Oregon's.
Length: Montana is 319 miles (514 km) long from north to south; Oregon is 453 miles (730 km). Oregon's north-south length is 1.4 times (42%) longer than Montana's.
Width: Montana spans 607 miles (976 km) east to west; Oregon spans 445 miles (715 km). Montana's east-west width is 1.4 times (36%) wider than Oregon's.
Highest point: Montana's highest point is Granite Peak at 12,767 feet (3,891 m); Oregon's is Mount Hood at 11,232 feet (3,424 m). Granite Peak is 1,535 feet higher than Mount Hood.
Lowest point: Montana's lowest point is Kootenai River at 1,805 feet; Oregon's is Pacific Ocean at 0 feet. Oregon's lowest point is 1,805 feet lower.
Montana vs Oregon Population and History
Population: Montana has a population of 1,137,233 (2024), while Oregon has 4,272,371 (2024). Oregon's population is 3.8 times (276%) larger than Montana's.
Population density: Montana: 7.8 people per square mile vs Oregon: 44.5. Oregon's population density is 5.7 times (471%) higher than Montana's.
Biggest city: Montana's biggest city is Billings with 121,483 people; Oregon's is Portland with 635,749. Portland's population is 5.2 times (423%) larger than Billings'.
Largest metro area: Montana's largest metropolitan area is Billings, MT metro area (192,531 people) vs Oregon's Portland-Vancouver-Hillsboro, OR-WA metro area (2,537,904). Portland-Vancouver-Hillsboro, OR-WA metro area's population is 13.2 times larger than Billings, MT metro area's.
History: Montana: Admitted to the Union on November 8, 1889, as the 41st state. Oregon: Admitted to the Union on February 14, 1859, as the 33rd state. In its current form, Oregon is the older of the two by 30 years.
Montana vs Oregon Economy
GDP: Montana's GDP is $78.4 billion (2024) vs Oregon's $330.2 billion. Oregon's economic output is 4.2 times (321%) larger than Montana's.
GDP per capita: Montana: $68,975 per person vs Oregon: $77,299. Oregon's GDP per capita is 1.1 times (12%) higher than Montana's.
Average income: Montana: $69,240 vs Oregon: $70,823 average income per person (per capita personal income). Montana and Oregon have about the same average income.
Montana vs Oregon Counties
Number of counties: Montana has 56 counties, while Oregon has 36. Montana's county count is 1.6 times (56%) higher than Oregon's.
Biggest county by area: Montana's largest county is Beaverhead County at 5,543 square miles; Oregon's is Harney County at 10,134 square miles. Harney County's land area is 1.8 times (83%) larger than Beaverhead County's.
Smallest county by area: Montana: Silver Bow County (718 sq mi) vs Oregon: Multnomah County (431 sq mi). Silver Bow County's land area is 1.7 times (67%) larger than Multnomah County's.
Most populous county: Montana: Yellowstone County (171,583 people) vs Oregon: Multnomah County (795,897 people). Multnomah County's population is 4.6 times (364%) larger than Yellowstone County's.
Least populous county: Montana: Petroleum County (525 people) vs Oregon: Wheeler County (1,456 people). Wheeler County's population is 2.8 times (177%) larger than Petroleum County's.
Richest county: Montana: Gallatin County ($94,573 per capita income) vs Oregon: Deschutes County ($86,176). Gallatin County's income is 1.1 times (10%) richer than Deschutes County's.
Poorest county: Montana: Blaine County ($37,554 per capita income) vs Oregon: Malheur County ($42,974). Malheur County's income is 1.1 times (14%) richer than Blaine County's.
Montana vs Oregon Taxes
State income tax: Montana has a top income tax rate of 5.65%, while Oregon has a top income tax rate of 9.9%. Oregon's top rate is 4.25 percentage points higher.
Property tax: Montana: 0.69% effective rate vs Oregon: 0.78% of home value per year. Oregon's rate is 0.09 percentage points higher.
Sales tax: Montana: 0% combined state and average local rate vs Oregon: 0%. The two are essentially equal.
Official Websites
Montana official website · Oregon official website
More Size Comparisons
All Montana size comparisons · All Oregon 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.