A scan driver for a liquid crystal display (LCD) includes first and second address logic units, first and second level shifters and a decoder. The first address logic unit enables an ith first address signal among N first address signals during a Kth clock period according to a control signal, wherein the number i is equal to a remainder of K/N. The second address logic unit enables a jth second address signal among M second address signals during the Kth clock period according to the control signal, wherein the number j is equal to a quotient of K/N plus 1. The first and second level shifters respectively increase swings of the first and second address signals. When the ith first address signal and the jth second address signal are enabled, the decoder enables a (j−1)×N+i)th scan signal among M×N scan signals.