Oh. Rev. Code Sec. 2151.23(B)(2)
Except as provided in divisions (G) and (I) of section 2301.03 of the Revised Code, which refers to Richland and Summit counties, the juvenile court has original jurisdiction to determine the parentage of any child alleged to have been born out of wedlock pursuant to sections 3111.01 to 3111.18 of the Revised Code.