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Pennsylvania is approximately 116,075 sq km, while Ohio is approximately 106,056 sq km, making Ohio 91.37% the size of Pennsylvania. Meanwhile, the population of Pennsylvania is ~12.7 million people (1.2 million fewer people live in Ohio).
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Size of Ohio vs. United States
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Size of Ohio (US) vs. Texas (US)
Size of Ohio (US) vs. New York (US)
Size of Ohio (US) vs. New Jersey (US)
Size of Ohio (US) vs. Massachusetts (US)
Size of Ohio (US) vs. North Carolina (US)
Size of Ohio (US) vs. Florida (US)