Ohio Rev. Code § 2711.16
Jurisdiction of judicial proceedings provided for by sections 2711.01 to 2711.14, inclusive, of the Revised Code, is generally in the courts of common pleas, and actions and proceedings brought under such sections shall be brought either in the court of common pleas of the county designated by the parties to the arbitration agreement as provided in section 2711.08 of the Revised Code, which designation is an irrevocable consent of the parties thereto to such jurisdiction, or, whether or not such designation has been made, in the court of common pleas of any county in which a party in interest resides or may be summoned, or if any party in interest is a corporation, in any county in which such corporation is situated, or has or had its principal office or place of business, or in which such corporation has an office or agent, or in any county in which a summons may be served upon the president, chairman or president of the board of directors or trustees, or other chief officer.
R.C. §2711.16