Ohio Rev. Code § 2305.01
Except as otherwise provided by this section or section 2305.03 of the Revised Code, the court of common pleas has original jurisdiction in all civil cases in which the sum or matter in dispute exceeds the exclusive original jurisdiction of county courts and appellate jurisdiction from the decisions of boards of county commissioners. The court of common pleas shall not have jurisdiction, in any tort action to which the amounts apply, to award punitive or exemplary damages that exceed the amounts set forth in section 2315.21 of the Revised Code. The court of common pleas shall not have jurisdiction in any tort action to which the limits apply to enter judgment on an award of compensatory damages for noneconomic loss in excess of the limits set forth in section 2315.18 of the Revised Code.
The court of common pleas may on its own motion transfer for trial any action in the court to any municipal court in the county having concurrent jurisdiction of the subject matter of, and the parties to, the action, if the amount sought by the plaintiff does not exceed one thousand dollars and if the judge or presiding judge of the municipal court concurs in the proposed transfer. Upon the issuance of an order of transfer, the clerk of courts shall remove to the designated municipal court the entire case file. Any untaxed portion of the common pleas deposit for court costs shall be remitted to the municipal court by the clerk of courts to be applied in accordance with section 1901.26 of the Revised Code, and the costs taxed by the municipal court shall be added to any costs taxed in the common pleas court.
The court of common pleas has jurisdiction in any action brought pursuant to division (I) of section 4781.40 of the Revised Code if the residential premises that are the subject of the action are located within the territorial jurisdiction of the court.
The courts of common pleas of Adams, Athens, Belmont, Brown, Clermont, Columbiana, Gallia, Hamilton, Jefferson, Lawrence, Meigs, Monroe, Scioto, and Washington counties have jurisdiction beyond the north or northwest shore of the Ohio river extending to the opposite shore line, between the extended boundary lines of any adjacent counties or adjacent state. Each of those courts of common pleas has concurrent jurisdiction on the Ohio river with any adjacent court of common pleas that borders on that river and with any court of Kentucky or of West Virginia that borders on the Ohio river and that has jurisdiction on the Ohio river under the law of Kentucky or the law of West Virginia, whichever is applicable, or under federal law.
R.C. § 2305.01