Ohio Rev. Code Ann. § 301.16

After having agreed upon the place for the seat of justic as provided in section 301.15 of the Revised Code, the commissioners, provided for by section 301.14 of the Revised Code, shall make a report to the next court of common pleas to be held in such county, if it has been organized. If the county has not been organized, such report shall be made to the court of common pleas of any county to which such new county, or any part thereof, is attached for judicial purposes.