W. Va. Code § 6-5-1
The terms of officers, except when elected or appointed to fill vacancies, shall begin respectively as follows: That of Governor, Secretary of State, State Superintendent of Free Schools, Treasurer, Auditor, Attorney General and Commissioner of Agriculture, on the first Monday after the second Wednesday of January next after their election; that of a member of the Legislature, on December 1, next after his or her election; and that of the justices of the Supreme Court of Appeals, the judges of the Intermediate Court of Appeals, the judges of the several circuit courts, the judges of the family and other inferior courts, the county commissioners, prosecuting attorneys, surveyors of land, assessors, sheriffs, clerks of the circuit, or other inferior courts, clerks of the county commissions, magistrates, on January 1, next after their election.
Whenever a person is elected or appointed to fill a vacancy, his or her term shall be as prescribed by chapter three of this code.
W. Va. Code § 6-5-1