Ohio Rev. Code § 5553.42
The board of county commissioners shall give notice to the owners of lands through which the proposed road will pass of the filing of the petition provided for in section 5553.41 of the Revised Code and the date and place of the hearing thereon. Such notice shall be served on such owners personally, or by leaving a copy of such notice at the usual place of residence of such owners at least five days before the date of the hearing on said petition. Proof of service of such notice shall be made by affidavit of the person serving such notice. If any of such owners are nonresidents of the county, the board shall give notice to such nonresidents by publication once each week for two consecutive weeks in a newspaper of general circulation in the county or as provided in section 7.16 of the Revised Code. A copy of the newspaper containing such notice shall be mailed by the county auditor to each nonresident whose post-office address is known to such auditor. Such notice shall state the time and place of the hearing on claims for compensation and damages.
R.C. § 5553.42