The map above shows Oklahoma and Pennsylvania side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
Oklahoma vs Pennsylvania Geography
Land area: Oklahoma has a land area of 68,597 square miles (177,665 km²), while Pennsylvania has 44,742 square miles (115,882 km²). Oklahoma's land area is 1.5 times (53%) larger than Pennsylvania's.
Total area: Oklahoma: 69,899 square miles (181,038 km²) vs Pennsylvania: 46,054 square miles (119,279 km²), including inland and coastal water. Oklahoma's total area is 1.5 times (52%) larger than Pennsylvania's.
Length: Oklahoma is 533 miles (857 km) long from north to south; Pennsylvania is 284 miles (458 km). Oklahoma's north-south length is 1.9 times (88%) longer than Pennsylvania's.
Width: Oklahoma spans 490 miles (789 km) east to west; Pennsylvania spans 307 miles (495 km). Oklahoma's east-west width is 1.6 times (60%) wider than Pennsylvania's.
Highest point: Oklahoma's highest point is Black Mesa at 4,980 feet (1,518 m); Pennsylvania's is Mount Davis at 3,210 feet (978 m). Black Mesa is 1,770 feet higher than Mount Davis.
Lowest point: Oklahoma's lowest point is Little River at 289 feet; Pennsylvania's is Delaware River at 0 feet. Pennsylvania's lowest point is 289 feet lower.
Oklahoma vs Pennsylvania Population and History
Population: Oklahoma has a population of 4,095,393 (2024), while Pennsylvania has 13,078,751 (2024). Pennsylvania's population is 3.2 times (219%) larger than Oklahoma's.
Population density: Oklahoma: 59.7 people per square mile vs Pennsylvania: 292.3. Pennsylvania's population density is 4.9 times (390%) higher than Oklahoma's.
Biggest city: Oklahoma's biggest city is Oklahoma City with 712,919 people; Pennsylvania's is Philadelphia with 1,573,916. Philadelphia's population is 2.2 times (121%) larger than Oklahoma City's.
Largest metro area: Oklahoma's largest metropolitan area is Oklahoma City, OK metro area (1,497,821 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 4.2 times (323%) larger than Oklahoma City, OK metro area's.
History: Oklahoma: Admitted to the Union on November 16, 1907, as the 46th 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 120 years.
Oklahoma vs Pennsylvania Economy
GDP: Oklahoma's GDP is $263.7 billion (2024) vs Pennsylvania's $1,007.9 billion. Pennsylvania's economic output is 3.8 times (282%) larger than Oklahoma's.
GDP per capita: Oklahoma: $64,388 per person vs Pennsylvania: $77,062. Pennsylvania's GDP per capita is 1.2 times (20%) higher than Oklahoma's.
Average income: Oklahoma: $63,708 vs Pennsylvania: $70,678 average income per person (per capita personal income). Pennsylvania's average income is 1.1 times (11%) higher than Oklahoma's.
Oklahoma vs Pennsylvania Counties
Number of counties: Oklahoma has 77 counties, while Pennsylvania has 67. Oklahoma's county count is 1.1 times (15%) higher than Pennsylvania's.
Biggest county by area: Oklahoma's largest county is Osage County at 2,247 square miles; Pennsylvania's is Lycoming County at 1,229 square miles. Osage County's land area is 1.8 times (83%) larger than Lycoming County's.
Smallest county by area: Oklahoma: Marshall County (372 sq mi) vs Pennsylvania: Montour County (130 sq mi). Marshall County's land area is 2.9 times (185%) larger than Montour County's.
Most populous county: Oklahoma: Oklahoma County (816,490 people) vs Pennsylvania: Philadelphia County (1,573,916 people). Philadelphia County's population is 1.9 times (93%) larger than Oklahoma County's.
Least populous county: Oklahoma: Cimarron County (2,133 people) vs Pennsylvania: Cameron County (4,348 people). Cameron County's population is 2.0 times (104%) larger than Cimarron County's.
Richest county: Oklahoma: Washington County ($126,749 per capita income) vs Pennsylvania: Chester County ($110,883). Washington County's income is 1.1 times (14%) richer than Chester County's.
Poorest county: Oklahoma: Atoka County ($38,709 per capita income) vs Pennsylvania: Forest County ($30,234). Atoka County's income is 1.3 times (28%) richer than Forest County's.
Oklahoma vs Pennsylvania Taxes
State income tax: Oklahoma has a top income tax rate of 4.5%, while Pennsylvania has a top income tax rate of 3.07%. Oklahoma's top rate is 1.43 percentage points higher.
Property tax: Oklahoma: 0.75% effective rate vs Pennsylvania: 1.16% of home value per year. Pennsylvania's rate is 0.41 percentage points higher.
Sales tax: Oklahoma: 9.06% combined state and average local rate vs Pennsylvania: 6.34%. Oklahoma's combined rate is 2.72 percentage points higher.
Official Websites
Oklahoma official website · Pennsylvania official website
More Size Comparisons
All Oklahoma 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.