Abstract: An adjustable mailbox is provided. The adjustable mailbox may include post having an inner post and an outer post. The inner post may fit within and telescope relative to the outer post. The outer post may include a pin hole, and the inner post may include a plurality of adjustment holes. A pin may fit within the pin hole and an aligned adjustment hole. To adjust the height of the mailbox, the pin may be removed, the inner post may be adjusted so that a different adjustment hole is aligned with the pin hole, and the pin may be inserted into the pin hole and the different adjustment hole to fix the post in place.