W. Va. Const. art. IV, § 4

Persons entitled to hold office — Age requirements. No person, except citizens entitled to vote, shall be elected or appointed to any state, county or municipal office; but the governor and judges must have attained the age of thirty, and the attorney general and senators the age of twenty-five years, at the beginning of their respective terms of service; and must have been citizens of the state for five years next preceding their election or appointment, or be citizens at the time this constitution goes into operation.