Abstract: The present invention relates to a mailbox flag which is used to indicate to the owner of the mailbox when the mail has been delivered. The flag itself comprises an elongated arm of at least substantially uniform weight distribution from end to end of the arm. The arm has a mounting region for pivotally mounting it to a mailbox with the mounting region being located off-center and closer to one end than the other end of the arm thereby providing long and short ends and a weight imbalance in the arm when it is mounted to the mailbox. The short end of the arm is bent, preferably at 90.degree. to the remainder of the arm to provide an actual flag portion on the arm without affecting its weight distribution. The door of the mailbox is fitted with a catch which receives the longer end of the flag and supports it in a horizontal position.