Ohio Revised Code Title XIX. Courts Municipal Mayor's County § 1907.15

Whenever the territory of a county court district is reduced by the territorial expansion of municipal court jurisdiction, the presiding judge may redetermine areas of separate jurisdiction and, if necessary, reassign areas so as to make each area of separate jurisdiction as equal in population and case load to others in the district as is possible under the altered conditions.

In county court districts exceeding one hundred twenty thousand population, the presiding judge of the county court may assign more than one county court judge to an area of separate jurisdiction. In any county court district of that nature, the presiding judge from time to time may assign a judge from one area of separate jurisdiction to another area of separate jurisdiction and redetermine and reassign areas of separate jurisdiction. Upon that redetermination and reassignment, the presiding judge shall consider, in addition to population, the case load of each area of separate jurisdiction.

(B) The jurisdiction of each county court judge shall be coextensive with the boundaries of the county court district.