The map above shows Montana and Pennsylvania side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Montana vs Pennsylvania Geography
Land area: Montana has a land area of 145,550 square miles (376,973 km²), while Pennsylvania has 44,742 square miles (115,882 km²). Montana's land area is 3.3 times (225%) larger than Pennsylvania's.
Total area: Montana: 147,043 square miles (380,840 km²) vs Pennsylvania: 46,054 square miles (119,279 km²), including inland and coastal water. Montana's total area is 3.2 times (219%) larger than Pennsylvania's.
Length: Montana is 319 miles (514 km) long from north to south; Pennsylvania is 284 miles (458 km). Montana's north-south length is 1.1 times (12%) longer than Pennsylvania's.
Width: Montana spans 607 miles (976 km) east to west; Pennsylvania spans 307 miles (495 km). Montana's east-west width is 2.0 times (98%) wider than Pennsylvania's.
Highest point: Montana's highest point is Granite Peak at 12,767 feet (3,891 m); Pennsylvania's is Mount Davis at 3,210 feet (978 m). Granite Peak is 9,557 feet higher than Mount Davis.
Lowest point: Montana's lowest point is Kootenai River at 1,805 feet; Pennsylvania's is Delaware River at 0 feet. Pennsylvania's lowest point is 1,805 feet lower.
Montana vs Pennsylvania Population and History
Population: Montana has a population of 1,137,233 (2024), while Pennsylvania has 13,078,751 (2024). Pennsylvania's population is 11.5 times larger than Montana's.
Population density: Montana: 7.8 people per square mile vs Pennsylvania: 292.3. Pennsylvania's population density is 37.5 times higher than Montana's.
Biggest city: Montana's biggest city is Billings with 121,483 people; Pennsylvania's is Philadelphia with 1,573,916. Philadelphia's population is 13.0 times larger than Billings'.
Largest metro area: Montana's largest metropolitan area is Billings, MT metro area (192,531 people) vs Pennsylvania's Philadelphia-Camden-Wilmington, PA-NJ-DE-MD metro area (6,330,422). Philadelphia-Camden-Wilmington, PA-NJ-DE-MD metro area's population is 32.9 times larger than Billings, MT metro area's.
History: Montana: Admitted to the Union on November 8, 1889, as the 41st state. Pennsylvania: Admitted to the Union on December 12, 1787, as the 2nd state. In its current form, Pennsylvania is the older of the two by 102 years.
Montana vs Pennsylvania Economy
GDP: Montana's GDP is $78.4 billion (2024) vs Pennsylvania's $1,007.9 billion. Pennsylvania's economic output is 12.9 times larger than Montana's.
GDP per capita: Montana: $68,975 per person vs Pennsylvania: $77,062. Pennsylvania's GDP per capita is 1.1 times (12%) higher than Montana's.
Average income: Montana: $69,240 vs Pennsylvania: $70,678 average income per person (per capita personal income). Montana and Pennsylvania have about the same average income.
Montana vs Pennsylvania Counties
Number of counties: Montana has 56 counties, while Pennsylvania has 67. Pennsylvania's county count is 1.2 times (20%) higher than Montana's.
Biggest county by area: Montana's largest county is Beaverhead County at 5,543 square miles; Pennsylvania's is Lycoming County at 1,229 square miles. Beaverhead County's land area is 4.5 times (351%) larger than Lycoming County's.
Smallest county by area: Montana: Silver Bow County (718 sq mi) vs Pennsylvania: Montour County (130 sq mi). Silver Bow County's land area is 5.5 times (451%) larger than Montour County's.
Most populous county: Montana: Yellowstone County (171,583 people) vs Pennsylvania: Philadelphia County (1,573,916 people). Philadelphia County's population is 9.2 times (817%) larger than Yellowstone County's.
Least populous county: Montana: Petroleum County (525 people) vs Pennsylvania: Cameron County (4,348 people). Cameron County's population is 8.3 times (728%) larger than Petroleum County's.
Richest county: Montana: Gallatin County ($94,573 per capita income) vs Pennsylvania: Chester County ($110,883). Chester County's income is 1.2 times (17%) richer than Gallatin County's.
Poorest county: Montana: Blaine County ($37,554 per capita income) vs Pennsylvania: Forest County ($30,234). Blaine County's income is 1.2 times (24%) richer than Forest County's.
Montana vs Pennsylvania Taxes
State income tax: Montana has a top income tax rate of 5.65%, while Pennsylvania has a top income tax rate of 3.07%. Montana's top rate is 2.58 percentage points higher.
Property tax: Montana: 0.69% effective rate vs Pennsylvania: 1.16% of home value per year. Pennsylvania's rate is 0.47 percentage points higher.
Sales tax: Montana: 0% combined state and average local rate vs Pennsylvania: 6.34%. Pennsylvania's combined rate is 6.34 percentage points higher.
Official Websites
Montana official website · Pennsylvania official website
More Size Comparisons
All Montana size comparisons · All Pennsylvania 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.