A wire grid polarizer includes a substrate, a first layer and a second layer disposed on the first layer, in which a first region and a second region are defined in the first layer, the first layer includes: a first wire grid including a plurality of first wires and disposed in the first region, where the first wires are spaced apart from each other, and no wire grid is disposed in the second region; and a first protection layer which covers the first wire grid, a third region and a fourth region are defined in the second layer, and the second layer includes a second wire grid including a plurality of second wires and disposed in the third region, where the second wires are spaced apart from each other, and no wire grid is disposed in the fourth region.