Ohio Rev. Code § 755.41
When lands lying within the limits of a municipal corporation have been dedicated to or for the use of the public for parks or park lands, and where such lands have remained unimproved and unused by the public for a period of twenty-one years and there appears to be little or no possibility that such lands will be improved and used by the public, the legislative authority of a municipal corporation in which said lands are located may, by ordinance, declare such parks or park lands vacated upon the petition of a majority of the abutting freeholders. No such parks or park lands shall be vacated unless notice of the pendency and prayer of the petition is given, in a newspaper of general circulation in the municipal corporation in which such lands are situated for three consecutive weeks, or as provided in section 7.16 of the Revised Code, preceding action on such petition. No such lands shall be vacated prior to a public hearing had thereon.
R.C. § 755.41