The map above shows Ohio and Pennsylvania side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Ohio vs Pennsylvania Geography
Land area: Ohio has a land area of 40,859 square miles (105,824 km²), while Pennsylvania has 44,742 square miles (115,882 km²). Pennsylvania's land area is 1.1 times (10%) larger than Ohio's.
Total area: Ohio: 44,826 square miles (116,098 km²) vs Pennsylvania: 46,054 square miles (119,279 km²), including inland and coastal water. Ohio and Pennsylvania have about the same total area.
Length: Ohio is 291 miles (468 km) long from north to south; Pennsylvania is 284 miles (458 km). Ohio and Pennsylvania have about the same north-south length.
Width: Ohio spans 317 miles (510 km) east to west; Pennsylvania spans 307 miles (495 km). Ohio and Pennsylvania have about the same east-west width.
Highest point: Ohio's highest point is Campbell Hill at 1,547 feet (472 m); Pennsylvania's is Mount Davis at 3,210 feet (978 m). Mount Davis is 1,663 feet higher than Campbell Hill.
Lowest point: Ohio's lowest point is Ohio River at 455 feet; Pennsylvania's is Delaware River at 0 feet. Pennsylvania's lowest point is 455 feet lower.
Ohio vs Pennsylvania Population and History
Population: Ohio has a population of 11,883,304 (2024), while Pennsylvania has 13,078,751 (2024). Pennsylvania's population is 1.1 times (10%) larger than Ohio's.
Population density: Ohio: 290.8 people per square mile vs Pennsylvania: 292.3. Ohio and Pennsylvania have about the same population density.
Biggest city: Ohio's biggest city is Columbus with 933,263 people; Pennsylvania's is Philadelphia with 1,573,916. Philadelphia's population is 1.7 times (69%) larger than Columbus'.
Largest metro area: Ohio's largest metropolitan area is Cincinnati, OH-KY-IN metro area (2,302,815 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 2.7 times (175%) larger than Cincinnati, OH-KY-IN metro area's.
History: Ohio: Admitted to the Union on March 1, 1803, as the 17th 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 16 years.
Ohio vs Pennsylvania Economy
GDP: Ohio's GDP is $923.1 billion (2024) vs Pennsylvania's $1,007.9 billion. Pennsylvania's economic output is 1.1 times (9%) larger than Ohio's.
GDP per capita: Ohio: $77,684 per person vs Pennsylvania: $77,062. Ohio and Pennsylvania have about the same GDP per capita.
Average income: Ohio: $64,464 vs Pennsylvania: $70,678 average income per person (per capita personal income). Pennsylvania's average income is 1.1 times (10%) higher than Ohio's.
Ohio vs Pennsylvania Counties
Number of counties: Ohio has 88 counties, while Pennsylvania has 67. Ohio's county count is 1.3 times (31%) higher than Pennsylvania's.
Biggest county by area: Ohio's largest county is Ashtabula County at 702 square miles; Pennsylvania's is Lycoming County at 1,229 square miles. Lycoming County's land area is 1.7 times (75%) larger than Ashtabula County's.
Smallest county by area: Ohio: Lake County (229 sq mi) vs Pennsylvania: Montour County (130 sq mi). Lake County's land area is 1.8 times (76%) larger than Montour County's.
Most populous county: Ohio: Franklin County (1,356,303 people) vs Pennsylvania: Philadelphia County (1,573,916 people). Philadelphia County's population is 1.2 times (16%) larger than Franklin County's.
Least populous county: Ohio: Vinton County (12,545 people) vs Pennsylvania: Cameron County (4,348 people). Vinton County's population is 2.9 times (189%) larger than Cameron County's.
Richest county: Ohio: Delaware County ($96,573 per capita income) vs Pennsylvania: Chester County ($110,883). Chester County's income is 1.1 times (15%) richer than Delaware County's.
Poorest county: Ohio: Noble County ($34,940 per capita income) vs Pennsylvania: Forest County ($30,234). Noble County's income is 1.2 times (16%) richer than Forest County's.
Ohio vs Pennsylvania Taxes
State income tax: Ohio has a top income tax rate of 2.75%, while Pennsylvania has a top income tax rate of 3.07%. Pennsylvania's top rate is 0.32 percentage points higher.
Property tax: Ohio: 1.22% effective rate vs Pennsylvania: 1.16% of home value per year. Ohio's rate is 0.06 percentage points higher.
Sales tax: Ohio: 7.29% combined state and average local rate vs Pennsylvania: 6.34%. Ohio's combined rate is 0.95 percentage points higher.
Official Websites
Ohio official website · Pennsylvania official website
More Size Comparisons
All Ohio 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.