Ohio Const. art. II, § 2

Representatives shall be elected biennially by the electors of the respective house of representatives districts; their term of office shall commence on the first day of January next thereafter and continue two years.

Senators shall be elected by the electors of the respective senate districts; their terms of office shall commence on the first day of January next after their election. All terms of senators which commence on the first day of January, 1969 shall be four years, and all terms which commence on the first day of January, 1971 shall be four years. Thereafter, except for the filling of vacancies for unexpired terms, senators shall be elected to and hold office for terms of four years.

No person shall hold the office of State Senator for a period of longer than two successive terms of four years. No person shall hold the office of State Representative for a period longer than four successive terms of two years. Terms shall be considered successive unless separated by a period of four or more years. Only terms beginning on or after January 1, 1993 shall be considered in determining an individual's eligibility to hold office.

In determining the eligibility of an individual to hold office in accordance to this article, (A) time spent in an office in fulfillment of a term to which another person was first elected shall not be considered provided that a period of at least four years passed between the time, if any, which the individual previously held that office, and the time the individual is elected or appointed to fulfill the unexpired term; and (B) a person who is elected to an office in a regularly scheduled general election and resigns prior to the completion of the term for which he or she was elected, shall be considered to have served the full term in that office.