A novel compact cross-polar chipless RFID tag with a ground plane is proposed in this paper. The proposed tag has multiple unbalanced resonators, i.e., the two arms of U-shaped with unequal length. These unequal arms are employed to generate the depolarizing (cross-polar) radar cross-section (RCS) response. The ground plane with the help of depolarizing identification enables this tag to be attached to highly reflective or absorptive background media such as metal or the human body. Low-cost screen printing has been adapted fabrication of the tag. The proposed tag presented in a 2 × 2 array configuration can encode 6-bits with a total size of 80 × 80 × 1 mm3.