A personalized mailbox flag system for displaying a sports team logo or other design such as a seasonal symbol or religious symbol. A mailbox sleeve is mounted over an existing mailbox. A decorative component is disposed on the mailbox sleeve. A decorative component is also disposed on the flag, which can pivot about the mailbox sleeve. Disposed on the free end of the flag is a décor mount, which displays a decorative component. The décor mount can pivot so as to orient the decorative component such that onlookers can read it.