O.C.G.A. § 28-2-2: Apportionment and qualifications for the Senate.

(a) There shall be 56 members of the Senate. The General Assembly shall by general law divide the state into 56 Senate districts which shall be composed of a portion of a county or a county or counties or a combination thereof and shall be represented by one Senator elected only by the electors of such district.

(b) A member of the Senate shall be a resident of the district which such member represents and at the time of such member’s election shall have been a resident of the territory embraced within such district for at least one year preceding such time.