Preble County Medical Center 450 Washington-Jackson Rd., Eaton, OH 45320 Directions Please go in the main entrance of the B side of the Medical Center. The A side goes to the YMCA, which is not the right side to enter. Coming from 75? Please take 35 W into Eaton, turn right on 127 and then left at Washington-Jackson Rd (there is a Kmart and Bob Evans on the corner where you turn).