I live in Ohio, I earned 1099 income in Pa. Do I pay income tax on that 1099 to Ohio or Pa ?

[TomD8]

You pay it to Pennsylvania.  The PA-OH reciprocity agreement applies only to wages subject to withholding.  1099-MISC income is not subject to withholding.

[SweetieJean]

File a nonresident return in PA, and then a resident one in OH.

[Hal_Al]

Technically,  you pay income tax, on the income, to both Ohio and PA. But, Ohio gives you a credit, or partial credit, for what you pay PA