Ohio's 3rd senatorial district has historically spanned vast portions of central Ohio from the Miami Valley to the Scioto Valley, but currently encompasses approximately a third of Franklin County. It encompasses Ohio House districts , and . It has a Cook PVI of EVEN. The district was represented by Ted Gray from 1951 to 1994, the longest tenure of any member of the Ohio Senate. Its current Senator is Democratic Tina Maharath. She resides in Canal Winchester, a city located in Franklin and Fairfield counties.