Ohio Rev. Code § 305.04
Before entering upon the discharge of official duties, each county commissioner, except as otherwise provided in section 3.061 of the Revised Code, shall give bond, signed by a bonding or surety company authorized to do business in this state, or, at the county commissioner's option, by two or more freeholders having real estate in the value of double the amount of the bond over and above all encumbrances to the state, in a sum not less than five thousand dollars, and the surety company to be approved by the probate judge of the county. The bond shall be conditioned for the faithful discharge of the commissioner's official duties, and for the payment of any loss or damage that the county may sustain by reason of the commissioner's failure in such duties. Such bond, with the oath of office and approval of the probate judge indorsed thereon, shall be deposited with the county treasurer and kept in the treasurer's office. The expense or premium for such bond shall be paid by the board of county commissioners and charged to the general fund of the county. Such surety may be discharged in the manner provided by section 2109.18 of the Revised Code for the release of sureties of guardians.
R.C. § 305.04