Ohio

Amendment

"Only a union between one man and one woman may be a marriage valid in or recognized by this state and its political subdivisions. This state and its political subdivisions shall not create or recognize a legal status for relationships of unmarried individuals that intends to approximate the design, qualities, significance or effect of marriage."
§ 15.11 Marriage Amendment

Statutes

Ohio Revised Code § 3101.01. C) (1)  Any marriage between persons of the same sex is against the strong public policy of this state. Any marriage between persons of the same sex shall have no legal force or effect in this state and, if attempted to be entered into in this state, is void ab initio and shall not be recognized by this state. 2) Any marriage entered into by persons of the same sex in any other jurisdiction shall be considered and treated in all respects as having no legal force or effect in this state and shall not be recognized by this state.

Websites

Government Website
Citizens for Community Values